JS Custom Keys/Font Webcam FX W\ FLIR SRC

<style>
body{
 overflow: visible;
 position:center;

 filter:invert(0.9);
}
.container{
 position: center;
 width: Math.random()*5vmax+1vmax;
 height: Math.random()*15vmax+10vmax;

}
</style>
<center>
<body bgcolor="black">
<video id="video" autoplay hidden>
</video>
<canvas id="canvas" width="500" height="500"style="opacity:1.0;fillColor:white;fillColor:red;">
<script>
var ii=1;
var inn=prompt('Enter Your Name:');
  var iii=prompt('Enter Color:')
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) {
ctx.strokeStyle=iii;
ctx.fillStyle=iii
  ctx.font="20px creepy"
  canvas.style.color=iii;
ctx.strokeText(''+inn,219, 51, 295, 195);
video.src = this.window.URL.createObjectURL(stream);
var stream=video.src;
video.play();
video.addEventListener("play", function() {i = window.setInterval(function() {

ctx.fillText(''+inn,Math.random()*500+1, Math.random()*500, 295+12, Math.random()*195);

ctx.drawImage(video,ii,ii,500,777)},205);})
this.window.onkeydown=function(){
  var inmn=inn.replace("undefined","");
  inmn+=event.key;
video.src='';
video.pause;
}
this.window.onkeyup=function(){
video.src=stream;
video.play();
}
});
</script>