JS Webcam Canvas BG Feint Flicker SRC


<body bgcolor="black" onload="setInterval(Gen,333)">
<video id="video" autoplay hidden>
</video>
<canvas id="canvas" width="500" height="500"style="opacity:1.0;fillColor:black;">
<script>
var ii=1;
var inn=0;
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:true};
navigator.mediaDevices.getUserMedia(mediaConfig).then(function(stream) {
video.src = this.window.URL.createObjectURL(stream);
video.play();
video.addEventListener("play", function() {i = window.setInterval(function() {
canvas.style.opacity-=0.0;
canvas.style.opacity=+Math.random()*.1;
ctx.drawImage(video,1,1,500,500)},inn);
}, false);
});
    function Gen()
{
var text = "";
var possible = "FABCGDEG01234567";
for(var i=0; i!=6; i++)
text+=possible.charAt(Math.floor(Math.random()*possible.length));
document.body.style.backgroundColor=(text);

}
</script>