Coffeescript Game Tutorial Add Some Color

색깔 원을 그리는 코드이다.

window.onload = ->

    # get a reference to the canvas
    canvas = document.getElementById("canvas")
    ctx = canvas.getContext("2d")

    ctx.fillStyle = "#00A308"
    ctx.beginPath()
    ctx.arc(220, 220, 50, 0, Math.PI*2, true)
    ctx.closePath()
    ctx.fill()

    ctx.fillStyle = "#FF1C0A"
    ctx.beginPath()
    ctx.arc(100, 100, 100, 0, Math.PI*2, true)
    ctx.closePath()
    ctx.fill()

    # the rectangle is half transparent
    ctx.fillStyle = "rgba(255, 255, 0, 0.5)"
    ctx.beginPath()
    ctx.rect(15, 150, 120, 120)
    ctx.closePath()
    ctx.fill()

Reference