thick arrows vs thin arrows

$(window).load ->
    game.init()


game=
    gameObjects:[]
    init: ->
        canvas= document.getElementById("Canvas")
        alert(canvas)
        @stage= new createjs.Stage(canvas)
        alert(@stage)

        @testshape= new createjs.Shape()
        @testshape.graphics.beginFill("#555")
        @testshape.graphics.rect(50,50,500,500)

        @stage.addChild(@testshape)
        @stage.update()

        window.onmousedown= (ev)=>
            alert "click"
            mx=ev.screenX
            my=ev.screenY
            @spawn({x:mx,y:my})

    spawn: (data)=>
        alert("rpcspawn")
        x=data.x
        y=data.y
        alert(" "+x+" "+y)
        alert(@stage)

        shape = new createjs.Shape()
        alert(shape)
        shape.graphics.beginFill("#555")
        shape.graphics.circle(x,y,5)
        @stage.addChild(shape)
        alert(@stage)
        @stage.update()