增加一个白色背景，然后保存文件成PSD格式，否则就不能被置换滤镜操作。

Add a white background. After that save the file, it has to be PSD otherwise it won't work with the Displace filter.

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声明AnimateFilter、目标显示对象、重复计数、期间之后，就可以声明即将操作的确切滤镜了。

After declaring AnimateFilter, the target display object, repeat count, duration, and the exact filter to be operated on can be declared.

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