$.shape.alignment

function update() {
	$.shape.alignment.x="left";	
	$.shape.alignment.y="top";
	$.colour.fill="blue";
	$.shape.rectangle( $.w/2, $.h/2, 30, 30 );
    
	$.shape.alignment.x="right";	
	$.shape.alignment.y="bottom";
	$.colour.fill="red";
	$.shape.rectangle( $.w/2, $.h/2, 30, 30  );   

	$.shape.alignment.x="center";	
	$.shape.alignment.y="center";
	$.colour.fill="green";
	$.shape.rectangle( $.w/2, $.h/2, 30, 30 );     
}