Sine Cosine Walk

stage.frameRate = 30;
var footA:MovieClip = makeFoot(0);
var footB:MovieClip = makeFoot(Math.PI);

addEventListener(Event.ENTER_FRAME, onLoop);
function onLoop(evt:Event):void {
	 graphics.clear();
	 graphics.lineStyle(0,0x000000);
	 graphics.moveTo(footA.x, footA.y);
	 graphics.curveTo(footA.x + 20, footA.y - 50, 200, 100);
	 graphics.curveTo(footB.x + 20, footB.y - 50, footB.x, footB.y);
}

function makeFoot(startAngle:Number):MovieClip {
	var mc:MovieClip = MovieClip(addChild(new MovieClip()));
	with(mc.graphics) beginFill(0x000000), curveTo(10,-10, 20, 0);
	mc.x = 200;
	mc.y = 200;
	mc.sx = mc.x;
	mc.sy = mc.y;
	mc.t = startAngle;
	mc.r = 50;
	mc.addEventListener(Event.ENTER_FRAME, onRunFoot);
	return mc;
}
function onRunFoot(evt:Event):void {
	var mc:MovieClip = MovieClip(evt.currentTarget);
     with(mc){
		x = sx + r * Math.cos(t); 
		y = Math.min(sy, sy + r * Math.sin(t));
		rotation = sy - y;
		t += .15;
	 }
}

This is a funny looking snippet that creates a very primitive walk cycle with the Graphics class and sine and cosine.