JS Web Audio API UK Hardcore Bassline Gen

<center>
<button>Start Wobble</button>
<script>
var context = new AudioContext();
var frequency;
document.querySelector("button").addEventListener("click", GenRandomWobble);
function GenRandomWobble() {
frequency = Math.floor(Math.random() * 100);
var Osc1 = context.createOscillator();
var Osc2 = context.createOscillator();
Osc1.type = "saw";
Osc1.frequency.value = frequency;
Osc1.connect(context.destination);
Osc2.type = "saw";
Osc2.frequency.value = frequency;
Osc1.detune.value = -15;
Osc2.detune.value=-90;
Osc2.connect(context.destination);
Osc1.start(context.currentTime);
Osc1.stop(context.currentTime + Math.random()*50);
Osc2.start(context.currentTime + 0);
Osc2.stop(context.currentTime + Math.random()*50);
alert('Frequency: '+frequency);
}
</script>
</center>