Workshop › Rhythm Lanes › Step 9 of 35

Draw the notes

What we are doing

draw now paints every note that is not hit yet and is on the screen: a 20-pixel block in its lane's color, centred on noteY.

```js
for (const n of notes) {
  if (n.hit) continue
  const y = noteY(n)
  if (y < -20 || y > canvas.height + 20) continue
  ctx.fillStyle = COLORS[n.lane]
  ctx.fillRect(LEFT + n.lane * LANE_W + 8, y - 10, LANE_W - 16, 20)
}
```

What it means

• for (const n of notes) repeats its body for every note, calling it n.
• continue skips to the next note: hit notes and notes off the screen are not drawn.
• || means "or". The block is 20 pixels tall, centred on y, 8 pixels in from the lane's sides.

Your turn

In draw, under the lanes loop, write the notes loop (before the function's last }).

Skills: Loops, Drawing on a canvas

← The clock decides where A clock that ticks →

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