Workshop › Bomberman-style Arena › Step 40 of 42

A clock

What we are doing

The game gets a clock. The loop runs 60 times a second, so counting the frames while playing gives the time: frames / 60 seconds, shown at the top right.

```js
let frames

  frames = 0

  if (state !== 'playing') return
  frames += 1

  ctx.textAlign = 'right'
  ctx.fillText('Time ' + Math.floor(frames / 60), canvas.width - 8, 22)
```

What it means

• frames counts the frames played; Math.floor rounds down, so 150 frames is 2 seconds.
• textAlign = 'right' makes x the right end of the text, 8 pixels from the right edge.

Your turn

1. Under let state write let frames; in reset, under state = 'playing', write frames = 0.
2. In update, under the first line, write frames += 1.
3. In draw, under the top line of text, write the two Time lines.

Skills: The game loop, Game states

← Play with a finger The fastest win →

All steps

1. Measure the arena
2. A floor of tiles
3. Draw it every frame
4. The arena as data
5. Draw what the grid says
6. Pillars
7. Crates
8. Keep the corners clear
9. The player
10. Keys being held
11. Slide towards a target
12. Walk
13. Drop a bomb
14. Space drops, bombs show
15. One bomb at a time
16. Bombs are in the way
17. The fuse burns down
18. Fire!
19. Flames die down
20. A cross of flames
21. Crates burn
22. Chain reactions
23. Bombs blink
24. Flames hurt
25. A moment of safety
26. Hearts
27. Out of lives
28. Game over
29. Enemies
30. Enemies wander
31. No turning back
32. Fight and touch
33. All enemies gone
34. Hidden power-ups
35. Uncover the power-ups
36. Pick them up
37. Show the powers
38. Which way is the finger?
39. Play with a finger
40. A clock
41. The fastest win
42. Build it yourself: a smarter enemy