Pygame - Snake shrinks randonmly

A visualization of the bug fix for Pygame.

## Pygame Bug Fix: Preventing Random Shrinking In Pygame, there's a common bug that can cause the head of a snake to randomly shrink when it collides with its own body. This issue arises from the use of the `remove` function to eliminate the head from the body list during the update process. The problem stems from how equality is determined between two `Rect` objects. They are considered equal if they share the same position and size. As a result, the head of the snake can sometimes occupy the same space as a segment of its body, leading to an incorrect collision detection. When the `remove` function is used to remove the head, its behavior is to delete the first instance of a given value from the list. However, since the head is added to the end of the list during each movement, the `remove` function mistakenly removes a segment of the body instead of the head. This results in the random shrinking of the snake. To resolve this issue, you can employ the `pop` function instead of the `remove` function. The `pop` function removes the last element from a list, ensuring that the head of the snake is always removed correctly, regardless of its position within the body list. By implementing this fix, you can prevent the random shrinking of the snake and ensure that the game runs smoothly.