diff --git a/assets/replay.js b/assets/replay.js
index 5509305..deaae87 100644
--- a/assets/replay.js
+++ b/assets/replay.js
@@ -80,12 +80,53 @@ function base64ToUint8array(base64) {
   return array;
 }
 
+async function play_ctrl(term, session, start, total_dur, paused, shifted, prog) {
+  var cur = 0
+  var new_pos = -1
+
+  start = parseInt(total_dur * start / 100)
+  term.reset()
+
+  for (const item of session) {
+    new_pos = shifted()
+
+    if (new_pos != -1) {
+      return new_pos
+    }
+
+    // we will blast through the beginning of the session
+    if (cur >= start) {
+      // we are cheating a little bit here, we do not want to wait for too long
+      exit = await sleep(Math.min(item.Duration, 800), paused)
+
+      if (exit) {
+        return
+      }
+    }
+
+    term.write(base64ToUint8array(item.Data))
+    cur += item.Duration
+
+    if (cur > start) {
+      prog(parseInt(cur * 100 / total_dur))
+    }
+  }
+
+  return -1
+}
 // replay session
 // term: xterm, path: session file to replay,
 // start: start position to replay in percentile, range 0-100
-// callback to update the progress bar
-async function replay_session(term, path, start, paused, prog, end) {
+// paused: callback whether to stop play
+// prog: callback to update the progress bar
+// shift: callback whether we should change position
+// end: callback when playback is finished
+async function replay_session(term, path, start, paused, shifted, prog, end) {
   var session
+  var total_dur = 0
+  var cur = 0
+  var new_pos = 0
+  var ret = 0
 
   // read file from server
   await fetch(path)
@@ -94,34 +135,24 @@ async function replay_session(term, path, start, paused, prog, end) {
       session = out
     })
 
-  var total_dur = 0
-  var cur = 0
-
   //calculate the total duration
   for (const item of session) {
     item.Duration = parseInt(item.Duration / 1000000)
     total_dur += item.Duration
   }
 
-  start = parseInt(total_dur * start / 100)
-  console.log("Total duration:", total_dur, "start replay on", start)
+  console.log("Total duration:", total_dur, "start replay on position", start)
 
-  term.reset()
-  for (const item of session) {
-    cur += item.Duration
-
-    // we will blast through the beginning of the session
-    if (cur >= start) {
-      // we are cheating a little bit here, we do not want to wait for too long
-      if (await sleep(Math.min(item.Duration, 1000), paused) == true) {
-        return
-      }
+  while (true) {
+    ret = await play_ctrl(term, session, start, total_dur, paused, shifted, prog)
+    if (ret == -1) {
+      break
     }
 
-    prog(parseInt(cur * 100 / total_dur))
-    term.write(base64ToUint8array(item.Data))
+    start = ret
   }
 
+  term.reset()
   end()
 }
 
diff --git a/assets/template/replay.html b/assets/template/replay.html
index 8e4eb62..1bc4d29 100644
--- a/assets/template/replay.html
+++ b/assets/template/replay.html
@@ -41,7 +41,7 @@
                 <img src="/assets/img/play.svg" id="play-btn" height="18px">
             </button>
             <input type="range" class="form-range" min="0" max="100" id="replay-control"
-                onchange="console.log(this.value)">
+                onchange="clicked = this.value">
         </div>
     </div>
 
@@ -54,6 +54,7 @@
         var icon = document.getElementById("play-btn")
         var path = "/records/{{.fname}}"
         var pause = false
+        var clicked = -1
 
         function playbtn() {
             if (icon.src.includes("play")) {
@@ -63,6 +64,11 @@
                     function () {
                         return pause
                     },
+                    function(){
+                        var tmp = clicked
+                        clicked = -1
+                        return tmp
+                    },
                     function (percent) {
                         rc.value = percent
                     },
diff --git a/main.go b/main.go
index 6e62cd9..f14a829 100644
--- a/main.go
+++ b/main.go
@@ -156,6 +156,10 @@ func main() {
 		})
 	})
 
+	rt.GET("/favicon.ico", func(c *gin.Context) {
+		c.File("./assets/img/favicon.ico")
+	})
+
 	// to update the tabs of current interactive and saved sessions
 	rt.GET("/update/:active", func(c *gin.Context) {
 		var active0, active1 string