Workshop › Pac-Man-style Maze Chase › Step 37 of 42

Scared ghosts wander slowly

What we are doing

A scared ghost is slow (16 frames a tile, half the player's speed) and has no target: at each crossing it picks one of its allowed directions at random.

```js
  if (g.scared) return 16

  if (g.scared) {
    g.dir = options[Math.floor(Math.random() * options.length)]
    return
  }
```

What it means

• Math.random() * options.length is a number from 0 up to the number of options; Math.floor makes it a whole index.
• The random choice comes after the dead-end check and before the target code, which a scared ghost skips.

Your turn

1. At the top of ghostFrames, write the scared line.
2. In chooseGhost, between the dead-end block and const t = target(g), write the random block.

Skills: Game states

← Power pellets work Eat a scared ghost →

All steps

1. The maze as text
2. The game loop
3. Draw the walls
4. A set of pellets
5. Draw the pellets
6. The player
7. Where can you walk?
8. What a mover remembers
9. One frame of movement
10. Move every frame
11. Turns you can press early
12. Glide between tiles
13. Turn back at once
14. Swipes on a phone
15. Eat the pellets
16. Show the score
17. Clear the maze
18. A red ghost
19. A ghost never turns back
20. The ghost walks
21. The ghost hunts you
22. Four ghosts in the house
23. One by one out of the house
24. Scatter or chase?
25. Every ghost to its corner
26. Pink cuts you off
27. Orange is shy
28. Cyan works with red
29. Wait for the first key
30. Tell the player to start
31. Three lives
32. Caught!
33. Game over
34. Play again
35. Frighten the ghosts
36. Power pellets work
37. Scared ghosts wander slowly
38. Eat a scared ghost
39. Blue, then flashing
40. Harder levels
41. A best score that lasts
42. Build it yourself: the slow tunnel