#myCanvas
arcTo
100,20,100,70,10|100,20,100,70,20|100,20,100,70,30|100,20,100,70,40|100,20,100,70,50|100,20,100,70,60|100,20,100,70,70|100,20,100,70,80|100,20,100,70,90|100,20,100,70,100
ctx.beginPath();
ctx.moveTo(50,20);
ctx.arcTo(#val);
ctx.stroke();