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Smiley Face
var canvas = document.createElement('canvas'),
ctx = canvas.getContext('2d')
function circle(x, y, r){
ctx.beginPath()
ctx.arc(x, y, r, 0, 2 * Math.PI)
ctx.stroke()
}
function mouth(theta){
ctx.beginPath()
ctx.arc(79, 75, 40, theta, Math.PI - theta)
ctx.stroke()
}
circle(72, 75, 62)
circle(50, 63, 12)
circle(100, 63, 12)
mouth(0.5938)
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