https://blog.faceutil.com/2017/03/15/flashdevelop%ec%9c%bc%eb%a1%9c-%ed%94%8c%eb%9e%98%ec%8b%9c-%ea%b0%9c%eb%b0%9c-%ec%8b%9c%ec%9e%91%ed%95%98%ea%b8%b0-3-%ef%bf%a5/