Issue Description

The functions weapon_overlay and magic_overlay in our codebase perform similar tasks but are implemented separately. This redundancy can lead to code maintainability issues and makes the codebase less efficient. Both functions create a background rectangle and then display a weapon or magic graphic in the center of this rectangle.

Suggested Solution

Refactor these two functions into a single, more generic function that can handle both weapons and magic overlays. This new function should be able to take parameters that define whether it's dealing with a weapon or magic graphic.

Proposed Function Signature

def overlay(self, index, x_coord, y_coord, has_switched, overlay_type):
    # Implementation