JS Webcam Cursor Rainbow Text Custom Effect SRC

  <body bgcolor="black" onmousemove="drawe();" onmousedown="drawe"
onchange="drawe" ondoubkeclick="drawe;">
<video id="video" autoplay hidden>
</video>
<canvas id="canvas" onchange="drawe;" onchange="drawe;" width="1000" height="1000"style="fillColor:red;">
<script>
var ii=1;
var inn=prompt('Enter Text:');
var video = document.getElementById("video");
var c = document.getElementById("canvas");
var ctx = c.getContext("2d");
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
var video = document.getElementById('video');
var mediaConfig = { video: true,audio:false};
function drawe(){
var possible = "FABCGDE0123456789";
var text = "";
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
for(var i=0; i!=6; i++)
text+=possible.charAt(Math.floor(Math.random()*possible.length))
ctx.fillStyle="#"+text;

  ctx.fillText(inn,event.x,event.y,100,100)
ctx.topmost=true;

text='';
}
navigator.mediaDevices.getUserMedia(mediaConfig).then(function(stream) {
if(ctx.width==500){event.mouseMove++;}
video.src = this.window.URL.createObjectURL(stream);
video.play();
video.addEventListener("play", function() {i = window.setInterval(function() {
canvas.style.opacity-=0.1
canvas.style.opacity++;
  ctx.topmost=false;
  if(ii<=50){}
  ctx.drawColor='red';
ctx.drawImage(video,1,1,500,500)},25);
ctx.fillText('to',1,1,500,23);
drawe;

}, false);
});
</script>