JS Canvas 2D Pipes Drawing SRC W/ Custom Speed Control V2

<html>
<center>
<body onload="var speed=prompt('Enter Speed To Render At In Millisecond format:(IE 0.1-2000)');
if(speed<0.1||speed==''){
alert('Speed Was Invalid Try Again!!');
return false;
}
setInterval(drawe,speed)" onclick="alert('Paused Canvas Drawing!!\n\nPress OK To Resume!!');" background-color="black">
<canvas id="myCanvas" width="1000" height="1000" style="background:black;">
</canvas>
<script>
function drawe(){
var text = "";
var possible = "FABCGDE0123456789";
var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");
for(var i=0; i!=6; i++)
text+=possible.charAt(Math.floor(Math.random()*possible.length));
ctx.strokeStyle='#'+text;
ctx.strokeRect(Math.random()*1000,Math.random()*1000,Math.random()*1000,Math.random()*10000);
ctx.stroke();
text='';
}
</script>
</body>
</html>