Our next enemy will be quite different. It will be easier to script, but offers a bigger challenge to the player. This enemy will be a ghost that is allowed to move through walls freely. Therefore, it can pop up anywhere without restrictions.
We first load a ghost sprite from the Scratch library. To do this, we perform the following steps:
We click the Choose sprite from library icon.
The ghost is also in the Fantasy category, just like the knight.
There are two options. We select Ghost2, because it looks more scary.
Press OK to add Ghost2 to the game.
Structurally, the scripts for the ghost will be the same as those for the knight and the cat. However, it doesn't need the takeStep function, because the ghost can just move all over the place.
We can first copy the createMaze listener script and the startGame listener script from Knight. This will shrink the ghost to the right size for the maze and also sets up where it should be placed.
Then, we...