https://blog.gongquiz.com/2021/12/31/%eb%8b%a4%ec%9d%8c-%ec%a4%91-line-staff%ed%98%95-%ec%95%88%ec%a0%84%ec%a1%b0%ec%a7%81%ec%97%90-%ea%b4%80%ed%95%9c-%ec%84%a4%eb%aa%85%ec%9c%bc%eb%a1%9c-%ea%b0%80%ec%9e%a5-%ec%98%b3%ec%9d%80-%ea%b2%83/