Workshop › Tower Defense › Step 31 of 42

Closer together

What we are doing

Later waves also come faster: the wait between two enemies shrinks by 2 frames each wave, down to 20.

```js
// Later waves come closer together, which is where splash damage shines.
spawnIn = Math.max(20, 46 - wave * 2)
```

What it means

• 46 - wave * 2 is 44 in wave 1, 40 in wave 3, 26 in wave 10...
• Math.max(20, ...) picks the bigger of the two, so the wait never drops below 20 frames.

Your turn

In update, replace spawnIn = 45 with the comment and the new line.

Skills: Game states

← Stronger every wave Out of lives →

All steps

1. Measure the map
2. A map of tiles
3. Draw it every frame
4. The road as corners
5. Fill in the road
6. Draw the road
7. Walking by distance
8. Enemies on the road
9. Walk
10. Off the end of the road
11. Here they come
12. Towers
13. From a click to a tile
14. Click to build
15. Where can you build?
16. Show the gold
17. Show before you click
18. Show the range
19. Pick a target
20. Fire!
21. A hit hurts
22. Homing bullets
23. Fizzle out
24. Gold for every kill
25. Lives
26. Health bars
27. Build, then defend
28. Space starts a wave
29. The wave is over
30. Stronger every wave
31. Closer together
32. Out of lives
33. No building after the end
34. The most waves survived
35. The game over screen
36. Play again
37. The bottom bar
38. Click to start
39. A second tower: the cannon
40. Tower buttons
41. Splash damage
42. Build it yourself: sell a tower