JS Canvas Random Rainbow Web Audio API Synth V3

<script>
var audioCtx=new AudioContext();
var oscillator = audioCtx.createOscillator();
var gainNode = audioCtx.createGain();
oscillator.connect(gainNode);
gainNode.connect(audioCtx.destination);
var WIDTH = window.innerWidth;
var HEIGHT = window.innerHeight;
var FreqMax = 2000;
var VolMax = 1.0;
var Freq = 0;
var Vol = 0.0;
oscillator.type = 'sawtooth';
oscillator.frequency.value = Math.random()*Freq;
oscillator.start();
gainNode.gain.value = Math.random()*Vol;
var CurX;
var CurY;
document.onmousemove = updatePage;
function updatePage(e) {
CurX = (window.Event) ? e.pageX : event.clientX + (document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft);
CurY = (window.Event) ? e.pageY : event.clientY + (document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop);
oscillator.frequency.value = (CurX/WIDTH) * FreqMax;
gainNode.gain.value = (CurY/HEIGHT) * VolMax;
osillator.detune=(0);
canvasDraw();
}
</script>
<html>
<body onmouseup="window.location.reload(window.location);" onmousemove="drawe();" background-color="white">
<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");
ctx.beginPath(Math.random()*1000,Math.random()*1000);
var Line=(Math.random()*1000);
var Line1=(Math.random()*1000);
ctx.moveTo(Math.random()*1000,Math.random()*1000);
for(var i=0; i!=6; i++)
text+=possible.charAt(Math.floor(Math.random()*possible.length));
ctx.strokeStyle='#'+text;
text='';
ctx.lineTo(Math.random()*1000,Math.random()*1000);
ctx.stroke()
ctx.paint();
ctx.clear();
}

</script>
</body>
</html>