JS Canvas Creepy Rainbow Flashing Drop Font Fx

<html>
<body onload="setInterval(drawe,22)" background-color="white">

<canvas id="myCanvas" width="1000" height="1000" style="background:black;">
</canvas>
<script>
var inn=prompt('Enter Text To Add To Glowing Sign:');
var outlen=(inn.length*4);
var ii=outlen;

function drawe(){
var out
ii=9;
var text = "";
var possible = "FABCGDE0123456789";
var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");
ctx.font="500px Comis Ariel"
for(var i=0; i!=3; i++)
text+=possible.charAt(Math.floor(Math.random()*possible.length));
ctx.strokeStyle='#'+text;
ctx.fillStyle="#"+text;
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.beginPath();
ctx.fillText(inn,250,250,ii+100,ii+100);
ctx.paint();
text='';
if(outlen<4){

}
}
</script>
</body>