This block is used in almost all 专案 involving the pen (especially graphic editor simulations), as clearing the screen once the project starts would be a main priority.
Some common uses for the Clear block:
- Clearing the screen in a paint program
當角色被點擊 造型換成 [Pressed v] 筆跡清除 造型換成 [Not Pressed v]
- Resetting the penning ground in a pattern maker
等待直到 <(dots made) > > 變數 [dots made v] 設為  筆跡清除
- Removing stamps in a maze generator or something similar
當收到訊息 [Next maze v] 筆跡清除 廣播訊息 [Generate v]