When the user erases a point on the app, actually what happens is the point isn't actually removed, but we just paint over it with a background color.
So, after erasing, when user changes background color, the erased path reappears with the previous background color.
When the user erases a point on the app, actually what happens is the point isn't actually removed, but we just paint over it with a background color.
So, after erasing, when user changes background color, the erased path reappears with the previous background color.