Make a list of IMGs that are to be drawn and get the wanted IMG at the correct index (DUH)
If you dont have a list of imgs and just drawing one then just use that IMG
There is also another way to get an IMG on the screen if you have to crop it, for that though
watch DafluffyPotato's video one Youtube called 'custom text system in Pygame'
Link: https://www.youtube.com/watch?v=Lh-cc5qzDqk