https://blog.faceutil.com/2017/03/20/mame-%eb%8c%84%ec%8b%b1-%ec%95%84%ec%9d%b4%ec%a6%88-dancing-eyes-%eb%8b%a4%ec%9a%b4-%eb%8b%a4%ec%9a%b4%eb%a1%9c%eb%93%9c-down-%ef%bc%83/