Pygame Erasing Images on Backgrounds

Question

You blit an image onto your surface to use as your background. Then you press button X to blit an image on the same surface, how do you erase the image? I have this so far,

Answer 1

Normally the blit workflow is just to blit the original background to screen.

In your code you would use screen.blit(background, (0,0))

When you start combining lots of surfaces you will probably want either a variable or a list of variables to keep track of screen state.

E.g.

Initialise Background

objectsonscreen = []
objectsonscreen.append(background)
screen.blit(background, (0,0))

Add Sprite

objectsonscreen.append(player)
screen.blit(player, (x, y))

Clear Sprite

objectsonscreen = [background]
screen.blit(background, (0,0))

See here for more information on sprites in Pygame. Note that if your background isn't an image background and is just a solid color you could also use screen.fill([0, 0, 0]) instead.