Background for game without refresh

Question

I am making a shooting game but I have a problem with the speed. Now I have a problem with the background. Because I have to refresh it, the game gets very slow. If I dont refresh it, al the moving parts stay printed on the screen.
Is there a simple solution to solve this? Remove the old figures that are printed? Or is there a possible High memory like in the old times with Dos?
I cant find a lot about this with Python and Raspberry Pi

Answer 1

Maybe refresh only the parts of the background, wich are needed. For Example if the top left corner has the be refreshed, reduce on this part, not all of the background.