What color does the ball change to when it crosses the middle of the window in the Hotspot Ball program?

In the Hotspot Ball program, the ball is designed to change color as it crosses the midpoint of the window to enhance visual interaction and feedback for the user. The color change to green at this specific point serves as a clear indicator that the ball has entered a new zone within the interface, which contributes to the overall user experience.

The choice of green is effective because it is often associated with "go" or positive action, thus reinforcing the program's dynamic behavior. This property of changing color signals to the player that they are interacting with the program correctly. The other colors, while they may also signify certain actions or states, do not align with the established design of this particular program.