https://s3-us-west-2.amazonaws.com/secure.notion-static.com/3423cd38-0e17-4d84-b664-bcc47531d801/Screen_Recording_2019-08-11_at_7.24.28_AM.mov

조건

if/else를 이용해 background,
height, radius를 변경해주세요.

transition의 ease값도 사용해주세요.