Workshop › Rhythm Lanes › Step 18 of 35

A message on the screen

What we are doing

The player should see how a press went. feedback holds a message { text, color, time }; when there is one, draw writes it big in the middle of the screen.

```js
let feedback // { text, color, time } shown for a moment

  feedback = null

  if (feedback) {
    ctx.fillStyle = feedback.color
    ctx.font = 'bold 28px sans-serif'
    ctx.fillText(feedback.text, canvas.width / 2, 300)
  }
```

What it means

• feedback is null (no message) after reset.
• if (feedback) is true only when there is a message; then it is written in its color, centred at y = 300.

Your turn

1. Above let lit write let feedback.
2. In reset, above lit = [0, 0, 0, 0], write feedback = null.
3. In draw, under the ['D', 'F', 'J', 'K'] line, write the if (feedback) block.

Skills: Game states

← One press, one hit Say Hit →

All steps

1. A stage for the notes
2. The first lane
3. Four lanes with a loop
4. The hit line
5. A function that draws
6. The song as text
7. From text to notes
8. The clock decides where
9. Draw the notes
10. A clock that ticks
11. The game loop
12. Lanes that light up
13. Keys for the lanes
14. Show the keys
15. Hit the closest note
16. Close enough in time
17. One press, one hit
18. A message on the screen
19. Say Hit
20. Let the message go
21. Perfect or good
22. Keep count
23. Missed notes
24. Score
25. Hits in a row
26. The multiplier
27. The song ends
28. Stop the clock
29. Accuracy
30. The grade
31. The results
32. Play again
33. Best score
34. Lanes you can tap
35. Build it yourself: a speed setting