Draw a star in html canvas

star.js

/*

takes the x,y coordinates, the number of spikes, the inner and the outer radius of the spikes

*/
function drawStar(ctx,cx,cy,spikes,r0,r1){
	var rot=Math.PI/2*3,x=cx,y=cy,step=Math.PI/spikes

	ctx.strokeSyle="#000";
	ctx.beginPath();
	ctx.moveTo(cx,cy-r0)
	for(i=0;i<spikes;i++){
		x=cx+Math.cos(rot)*r0;
		y=cy+Math.sin(rot)*r0;
		ctx.lineTo(x,y)
		rot+=step
		
		x=cx+Math.cos(rot)*r1;
		y=cy+Math.sin(rot)*r1;
		ctx.lineTo(x,y)
		rot+=step
	}
	ctx.lineTo(cx,cy-r0)
	ctx.stroke();
	ctx.closePath();
}

Satan style was on purpose?