Now that we're using sprites for our ghosts, we need to re-add some functionality that turns our ghosts "blue." The blue ghosts represent a scared state, something that's still active within our game (we can still eat the ghosts when a power up is obtained), but we're missing the visual indicator that touching a ghost won't hurt us anymore.

Here we're going to swap our ghosts' sprites with a new, blue sprite that I created behind the scenes.

To download this sprite, click the "Video Source Code" button above and click the download button associated with the sprite image in the GitHub commit.