diff --git a/public/stream.m3u b/public/stream.m3u
new file mode 100644
index 0000000..96021c0
--- /dev/null
+++ b/public/stream.m3u
@@ -0,0 +1 @@
+http://116.122.163.142:8000/stream
diff --git a/server.js b/server.js
index d3e33b1..e6c48af 100644
--- a/server.js
+++ b/server.js
@@ -57,10 +57,13 @@ fastify.get("/", function (request, reply) {
   reply.view("/src/pages/parade.html", {});
 });
 
-//get '/preview/:foldername'
+//get '/live
+fastify.get("/live", function (request, reply) {
+  reply.view("/src/pages/live.html", {});
+});
+
+//get '/preview/:foldername' --> request.params.foldername
 fastify.get("/preview/:foldername", function (request, reply) {
-  //
-  //request.params.foldername
   reply.view("/src/pages/preview.html", {});
 });
 
@@ -79,13 +82,19 @@ fastify.get("/preview/:foldername", function (request, reply) {
 
     let folders = [];
     for (const item of list) {
-      var fields = JSON.parse((await fs.readFile('/media/storage/public/sound-parade/' + item + '/fields.json')).toString('utf8'));
-      folders.push({
-        foldername: item,
-        group: fields.group,
-        title: fields.title,
-        comment: fields.comment,
+      let json = await fs.readFile('/media/storage/public/sound-parade/' + item + '/fields.json')
+      .catch((err) => {
+        console.error(err);
       });
+      if (json != undefined) {
+        var fields = JSON.parse(json.toString('utf8'));
+        folders.push({
+          foldername: item,
+          group: fields.group,
+          title: fields.title,
+          comment: fields.comment,
+        });
+      }
     }
 
     // console.log(folders);
@@ -172,19 +181,73 @@ fastify.get("/delete/:foldername/:pass", async function (request, reply) {
 fastify.post("/entry", async function (request, reply) {
 
   // stores files to tmp dir and return paths
-  const files = await request.saveRequestFiles();
+  const files = await request.saveRequestFiles().catch(err => {
+    console.error(err);
+  });
   let audiofile = files.find(f => f.fieldname == 'audiofile');
   let pixelfile = files.find(f => f.fieldname == 'pixels');
   let tmpdir = path.dirname(audiofile.filepath);
   // console.log(audiofile.fields.message.value);
 
-  console.log("hi.");
+  console.log("-- hi."); // got all files.
 
-  //convert to mp3 ?
-  var converted = false;
+  //conversion needed?
+  var conversion = false;
   if (path.extname(audiofile.filename) !== ".mp3") {
-    console.log("convert to mp3...");
-    converted = true;
+    conversion = true;
+    console.log("-- well.."); //conversion. is scheduled.
+  } else {
+    console.log("-- good"); //no conversion_
+  }
+
+  //upload
+  const client = new Client(server);
+
+  console.log("-- ready"); //file server opened
+
+  //create unique folder ==> timestamp + uuid
+  const folder = await client.createFolder("Storage/public/sound-parade/" + moment().tz('Asia/Seoul').format('YYYYMMDD-HHmmss-') + uuidv1());
+  //
+  const json = await folder.createFile("fields.json", Buffer.from(JSON.stringify({
+    group: audiofile.fields.group.value,
+    title: audiofile.fields.title.value,
+    comment: audiofile.fields.comment.value,
+    pass: audiofile.fields.pass.value
+  })));
+  const image = await folder.createFile("pixels.png", await fs.readFile(pixelfile.filepath));
+  //
+  if (conversion) {
+    console.log('---- hi conv');
+    //save original file as is. + we have scheduled a conversion.
+    let afile = await fs.readFile(audiofile.filepath)
+    .catch(err => {
+      console.error(err);
+    });
+    //
+    if (afile != undefined) {
+      const file = await folder.createFile(audiofile.filename, afile)
+      .catch(err => {
+        console.error(err);
+        console.log('---- createFile err.');
+        console.log('afile', afile);
+      });
+    } else {
+      console.log('afile == undef!');
+    }
+    console.log('---- yes conv');
+    //
+  } else {
+    console.log('---- no conv');
+    //rename & save original file.
+    const file = await folder.createFile("audio.mp3", await fs.readFile(audiofile.filepath).catch(err => console.error(err)));
+  }
+
+  console.log("-- saved"); //saved in file server.
+
+  //conversion needed?
+  var converted = false;
+  if (conversion) {
+    console.log("-- mp3..."); //converting to mp3...
     function converter() {
       return new Promise((resolve, reject) => {
         //
@@ -193,9 +256,12 @@ fastify.post("/entry", async function (request, reply) {
         ffmpeg()
           .addInput(audiofile.filepath)
           .on("error", function(err) {
+            console.log("-- err:", err);
             reject(err);
           })
           .on("end", function() {
+            console.log("-- fine."); //conversion succeesful
+            converted = true;
             resolve(outputFile);
           })
           .outputOptions('-b:a 192000')
@@ -203,33 +269,16 @@ fastify.post("/entry", async function (request, reply) {
           .run();
       });
     }
-    await converter();
-    // console.log(await fs.readdir(tmpdir));
+    await converter().catch((err) => { console.error(err); });
+
+    if (converted) {
+      const file = await folder.createFile("audio.mp3", await fs.readFile(tmpdir + '/converted.mp3'));
+      console.log("-- done");
+    }
+
   }
 
-  console.log("ok.");
-
-  //upload
-  const client = new Client(server);
-
-  console.log("good.");
-
-  //create unique folder ==> timestamp + uuid
-  const folder = await client.createFolder("Storage/public/sound-parade/" + moment().tz('Asia/Seoul').format('YYYYMMDD-HHmmss-') + uuidv1());
-  if (converted) {
-    const file = await folder.createFile("audio.mp3", await fs.readFile(tmpdir + '/converted.mp3'));
-  } else {
-    const file = await folder.createFile("audio.mp3", await fs.readFile(audiofile.filepath));
-  }
-  const image = await folder.createFile("pixels.png", await fs.readFile(pixelfile.filepath));
-  const json = await folder.createFile("fields.json", Buffer.from(JSON.stringify({
-    group: audiofile.fields.group.value,
-    title: audiofile.fields.title.value,
-    comment: audiofile.fields.comment.value,
-    pass: audiofile.fields.pass.value
-  })));
-
-  console.log("done.");
+  console.log("-- well done");
 
   reply.send('done!');
   //reply.redirect('/submit');
@@ -257,6 +306,11 @@ io.on("connection", function(socket) {
       fn(false);
     }
   });
+
+  socket.on("flow", function(req) {
+    io.emit("flow", req);
+  });
+
 });
 
 //
diff --git a/src/pages/entry.en.html b/src/pages/entry.en.html
index 2b2c654..ba7ebb6 100644
--- a/src/pages/entry.en.html
+++ b/src/pages/entry.en.html
@@ -42,7 +42,7 @@
     <div class="bg"></div>
     <div class="content">
       <div class="first"><a href="/entry">KR</a></div>
-      <div class="second"><a href="/">Home</a></div>
+      <div class="second"><a href="/">parade</a></div>
       <div class="notice">
         <section>
           <h1>Walking &nbsp;Towards &nbsp;the Flow</h1>
@@ -157,6 +157,9 @@
                 <input id="submit" type="submit" value="Upload" />
               </li>
             </ul>
+           <p>
+            ↓　
+           </p>
           </form>
         </section>
         <section>
diff --git a/src/pages/entry.html b/src/pages/entry.html
index f0035fd..f0257b5 100644
--- a/src/pages/entry.html
+++ b/src/pages/entry.html
@@ -42,7 +42,7 @@
     <div class="bg"></div>
     <div class="content">
       <div class="first"><a href="/en/entry">EN</a></div>
-      <div class="second"><a href="/" target="_blank">홈</a></div>
+      <div class="second"><a href="/" target="_blank">퍼레이드</a></div>
       <div class="notice">
         <section>
           <h1>흐름을 &nbsp;향하여 &nbsp;걷는</h1>
@@ -159,6 +159,9 @@
                 <input id="submit" type="submit" value="보내기!" />
               </li>
             </ul>
+          <p>
+            ↓　
+          </p>
           </form>
         </section>
         <section>
diff --git a/src/pages/live.html b/src/pages/live.html
new file mode 100644
index 0000000..3655f85
--- /dev/null
+++ b/src/pages/live.html
@@ -0,0 +1,285 @@
+<!DOCTYPE html>
+<html>
+
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <title>흐름을 향하여 걷는</title>
+    <link rel="stylesheet" href="/default.css" />
+    <style>
+     html,
+     body {
+       overflow: hidden;
+     }
+    </style>
+    <script src="/js/p5-v1.1.9.min.js"></script>
+    <script src="/js/socket-v2.3.0.io.slim.js"></script>
+    <script src="/js/Tone-14.8.36.min.js"></script>
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link href="https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@500&display=swap" rel="stylesheet" />
+  </head>
+
+  <body>
+    <div class="bg"></div>
+    <div class="content">
+    </div>
+    <script>
+     // // force https
+     // var http_confirm = location.href.split(":")[0];
+     // if (http_confirm == "http") {
+     //   window.location.replace("https://" + location.host);
+     // }
+
+     //
+     var socket = io(location.host);
+     var n = 0;
+     var fr = 20;
+     var arr = [];
+     var looper;
+     var score;
+     var logo;
+     var silence;
+     var clap;
+
+     //promisify -> new Tone.Player
+     function AudioImport(url) {
+       return new Promise((resolve, reject) => {
+         var audio = new Tone.Player(url, () => resolve(audio));
+       });
+     }
+
+     async function setup() {
+       noCanvas();
+       if (windowWidth > 1500 && windowWidth > windowHeight) {
+         fr = 30;
+       } else {
+         fr = 20;
+       }
+       frameRate(fr);
+
+       //p5 'draw()' doesn't work if user is not looking at the tab.
+       noLoop();
+       // --> use custom looper.
+     }
+
+     //
+     var myroom = -1;
+     var intro;
+     var ready;
+     //
+     socket.on("connect", async function() {
+       console.log("connected!");
+
+       //
+       silence = (await AudioImport("/audio/_silence.wav")).toDestination();
+       clap = (await AudioImport("/audio/clap01.mp3")).toDestination();
+
+       //TESTING... fixed to room 1.
+       // myroom = 1;
+
+       if (myroom == -1 && selectAll(".roomsel").length == 0) {
+         //initial connection -> ask the room number.
+
+         var roomsel = createDiv();
+         roomsel.class("roomsel");
+         var b = createButton("라이브! Live Performance-", 1);
+         var d = createDiv("흐름을&nbsp; 향하여&nbsp; 걷는 &nbsp;&nbsp;Walking towards the Flow");
+         d.class("title");
+         b.mouseClicked(function() {
+           silence.start();
+           //clap.start();
+
+           setTimeout(() => {
+             selectAll(".roomsel").forEach(item => {
+               item.remove();
+               // 1 second popup '.intro' div
+               intro = createDiv(
+                 "라이브<br>«흐름을 향하여 걷는»은 온라인 공간에 소리의 행렬을 만드는 사운드 퍼레이드입니다. 누구나 참여할 수 있는 이 퍼레이드는 여러분이 보내주시는 소리가 모여 만들어집니다.<br>소리가 들리지 않는다면, 볼륨을 확인해주시고, 스마트폰 환경에서는 진동해제해주세요. <br><br>Live Performance<br>«Walking Toward the Flow» is a sound parade that creates a procession of sounds in the online space. Anyone can participate. This parade is made by collecting the sounds you sent.<br>If there is no sound, check the volume and turn off the vibration in the smartphone environment."
+               );
+               intro.class("notice intro"); //-> fadeout & disapear by css animation style.
+             });
+           }, 1000);
+         });
+         roomsel.child(d);
+         roomsel.child(b);
+       } else {
+         //re-connection -> just connect to remembered room!
+         socket.emit("room", myroom, function(res) {
+           if (res) {
+             console.log("entered the room -> " + myroom);
+           } else {
+             console.log("rejected!");
+           }
+         });
+       }
+     });
+
+     //var fading_factor = 0.3; //30%
+     var fading_factor = 0.5; //50%
+     socket.on("flow", async function(flow) {
+
+       console.log(flow);
+       var list = await new Promise((resolve, reject) => {
+         loadJSON("/entries", (json) => resolve(json));
+       })
+       console.log(list);
+
+       // var object = flow.object;
+       var object = {
+         "id": 1,
+         "type": "abc",
+         "src": "https://p.dianaband.info/public/sound-parade/" + list[flow] + "/pixels.png",
+         "audio": "https://p.dianaband.info/public/sound-parade/" + list[flow] + "/audio.mp3",
+         "alt": "알트",
+         "size": {
+           "base": 40,
+           "random": 20
+         },
+         "y": {
+           "base": 20,
+           "random": 10
+         },
+         "showtime": 20000
+       };
+       console.log(object);
+
+       var img = createImg(object.src, object.alt, "", async function(im) {
+         //로딩이 끝나면, start!
+         var pv = new Tone.PanVol(0, -99).toDestination();
+         var snd = await AudioImport(object.audio); // NOTE: url with spaces didn't work here.
+         snd.connect(pv).start();
+         snd.loop = true;
+
+         //로딩이 끝나면, show!
+         im.show();
+
+         //그림의 크기와 초기 위치 ==> 가로 보기인 경우
+         var width = 0;
+         if (windowWidth > windowHeight) {
+
+           width = (windowHeight * (object.size.base * 1.4 + object.size.random * Math.random())) / 100; // 좀더 크게 + 40%  (ratio)
+           im.size(width, AUTO);
+
+           im.position(
+             windowWidth * (1 + fading_factor),
+             (windowHeight * (object.y.base + object.y.random * Math.random()) * 0.5) / 100 // 좀더 위로 위로 - 50%  (ratio)
+           );
+
+           //그림의 크기와 초기 위치 ==> 세로 보기인 경우
+         } else {
+
+           width = (windowHeight * (object.size.base + object.size.random * Math.random())) / 100; // json에서 정한 크기 그대로. (ratio)
+           im.size(width, AUTO);
+
+           im.position(
+             windowWidth * (1 + fading_factor),
+             (windowHeight * (object.y.base + object.y.random * Math.random())) / 100 // json에서 정한 위치 그대로. (ratio)
+           );
+         }
+
+         //추가 정보들
+         im.attribute("data-type", object.type);
+         im.attribute("data-showtime", object.showtime / 1000); //milli-sec. -> seconds.
+
+         //'아이콘' 들은 애니메이션을 시켜줘야 함...
+         if (object.type == "icon") {
+           //
+           im.class("rotate");
+           im.style("animation-duration", object.rotate + "s");
+           var orgs = im.style("transform-origin").split(" ");
+           var str = parseFloat(orgs[0]) + object.pivot.x + "px";
+           str = str + " " + parseFloat(orgs[1]) + object.pivot.y + "px";
+           im.style("transform-origin", str);
+           //
+         }
+
+         //로딩이 다 되면, rendering array에 추가.
+         var bundle = {
+           ref: object,
+           img: im,
+           sound: snd,
+           panvol: pv,
+           width: width
+         };
+         arr.push(bundle);
+       });
+
+       //첨에는 hide
+       img.hide();
+
+     });
+
+     //p5 'draw()' doesn't work if user is not looking at the tab.
+     Tone.Transport.scheduleRepeat((time) => {
+
+       //
+       for (var i = arr.length - 1; i >= 0; i -= 1) {
+         var bundle = arr[i];
+         var img = bundle.img;
+         var showtime = parseFloat(img.attribute("data-showtime"));
+         var type = img.attribute("data-type");
+         var x = img.position().x;
+         var y = img.position().y;
+         y = y + random(-1, 1);
+         x = x - windowWidth / (fr * showtime);
+
+         //
+         if (type == "icon") {
+           img.style("z-index", "-1");
+         }
+
+         img.position(x, y);
+         var pan = (x / windowWidth) * 2 - 1;
+
+         //panning
+         var snd = bundle.sound;
+         var pv = bundle.panvol;
+         if (x >= -bundle.width && x < windowWidth) {
+           pan = ((x + bundle.width) / (windowWidth + bundle.width)) * 2 - 1;
+           pv.pan.value = pan;
+           pv.volume.value = 0;//(dB)
+         } else {
+           var range;
+           var knob;
+           if (x >= windowWidth) {
+             range = windowWidth * fading_factor
+             knob = x - windowWidth;
+             pv.pan.value = 1;
+             pv.volume.value = knob / range * -20;
+           } else if (x < -bundle.width) {
+             range = windowWidth * fading_factor
+             knob = (x + bundle.width) * -1;
+             pv.pan.value = -1;
+             pv.volume.value = knob / range * -20;
+           }
+         }
+
+         //remove with sound fade-out
+         var exit_x = -bundle.width - windowWidth * fading_factor;
+         if (x < exit_x) {
+           img.remove();
+           snd.stop();
+           delete snd;
+           delete pv;
+           arr.splice(i, 1);
+         }
+       }
+       //
+
+     }, 1.0/fr);
+     Tone.Transport.start()
+
+     // function randomvoiceplay() {
+     //   (looper = function(timeout) {
+     //     setTimeout(function() {
+     //       voice[int(random(19))].play();
+     //       looper(random(8000, 12000));
+     //     }, timeout);
+     //   })(8000);
+     // }
+
+    </script>
+  </body>
+
+</html>
diff --git a/src/pages/preview.html b/src/pages/preview.html
index 102422a..669ec1f 100644
--- a/src/pages/preview.html
+++ b/src/pages/preview.html
@@ -312,7 +312,6 @@
          if (type == "icon") {
            img.style("z-index", "-1");
          }
-         3;
 
          img.position(x, y);
          var pan = (x / windowWidth) * 2 - 1;
@@ -350,7 +349,9 @@
            arr.splice(i, 1);
            if (arr.length == 0 && playing == false) {
              setTimeout(() => {
-               createDiv("미리보기가 끝났습니다. <br>Preview is over.").class("notice").style('text-align', 'center');
+               createDiv("미리보기가 끝났습니다. <br>Preview is over.<br><br>").class("notice").style('text-align', 'center')
+               .child(createButton("퍼레이드 가기").attribute('onclick', 'location.href="/"').style('margin', '1em 1em'))
+               .child(createButton("닫기").attribute('onclick', 'window.close()').style('margin', '1em 1em'))
              }, 3000);
            }
          }