Smiley using javascript

var ctx=document.getElementById("canvasDemo").getContext("2d");
ctx.beginPath();
ctx.arc(180,180,70,0,Math.PI*2,true);
ctx.moveTo(230,180);
ctx.arc(180,180,50,0,Math.PI,false);
ctx.moveTo(155,150);
ctx.arc(150,150,5,0,Math.PI*2,true);
ctx.moveTo(215,150);
ctx.arc(210,150,5,0,Math.PI*2,true);
ctx.fillText("Happy", 165, 270);
ctx.stroke();