JS Canvas Webcam Mass Mini Screen Flood Effect SRC V1

<body bgcolor="black">
<video id="video" autoplay hidden>
</video>
<canvas id="canvas" width="1000" height="1000" style="border:1px solid">
<script>
  alert('Prsss Any Key To Pause!!')
  var i=1
      var ii=100
var video = document.getElementById("video");
var c = document.getElementById("canvas");
var ctx = c.getContext("2d");
var i=0;
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
var video = document.getElementById('video');
var mediaConfig = { video: true,audio:false};
navigator.mediaDevices.getUserMedia(mediaConfig).then(function(stream) {
video.src = this.window.URL.createObjectURL(stream);
  var store =video.src;
video.play();
video.addEventListener("play", function() {i = window.setInterval(function() {
ctx.drawImage(video,Math.random()*Math.PI*i++,Math.random()*Math.PI*ii++,Math.random()*100,100)},35);

}, false);
  window.onkeydown=function(){
    this.video.src=('');
    this.video.pause();
    alert('Click Any Place To Restart Webcam/Effect!!')

  }
    window.onmouseup=function(){
   this.video.src=(store);
    this.video.play();

  }
});
</script>