HTML kodumdaki sorun nedir?

<canvas id="myCanvas" width="300" height="300" style="background-color:gray"></canvas>


<script>

var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");
var radius = canvas.height / 2;
ctx.translate(radius, radius);
radius = radius * 0.90;

function drawClock() {
	drawFace(ctx, radius);
	drawNumbers(ctx, radius);
	drawTime(ctx, radius);
}


function drawFace(ctx, radius) { 
ctx.beginPath();
ctx.arc(0,0,radius,0,2*Math.PI);
ctx.fillStyle = 'white';
ctx.fill();	
}