建立好一条路径后，为了使之可见，必须对它进行描边或填充。

Once you build a path, you must stroke it or fill it before it becomes visible.

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清单6演示了一个简单的例子，这个例子用各种方式描边和填充一些正方形。

Listing 6 demonstrates a simple example in which a few squares are stroked and filled in various ways.

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这些过程可以移动画笔(pen)，最终创建路径(path)，而路径可以被描边，可以用渐变方式和颜色进行填充(如果是封闭的)。

These procedures move the pen, which ultimately creates the path that can then be stroked or filled (when it is closed) with gradients and colors.

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