useDown){
			var drawcolor = "white";
			var TouchStartPos = leftTouchStartPos;
			if(!leftMouseDown){
				drawcolor = "DodgerBlue";
				TouchStartPos = rightTouchStartPos;
			}
			c.beginPath(); 
			c.strokeStyle = drawcolor; 
			c.lineWidth = 6; 
			c.arc(TouchStartPos.x, TouchStartPos.y, 40,0,Math.PI*2,true); 
			c.stroke();
			c.beginPath(); 
			c.strokeStyle = drawcolor; 
			c.lineWidth = 2; 
			c.arc(TouchStartPos.x, TouchStartPos.y, 60,0,Math.PI*2,true); 
			c.stroke();
			c.beginPath(); 
			c.stroke