Workshop › Typing Rain › Step 4 of 33

A function that draws

What we are doing

The words will fall, so the picture must be drawn again many times a second. We pack all the drawing lines into a function named draw, so one word repaints everything.

```js
function draw() {
  ctx.fillStyle = '#020617'
  ctx.fillRect(0, 0, canvas.width, canvas.height)
  ctx.fillStyle = '#7f1d1d'
  ctx.fillRect(0, GROUND + 4, canvas.width, 3)

  ctx.font = FONT
  ctx.textAlign = 'left'
  ctx.fillStyle = '#cbd5e1'
  ctx.fillText('rocket', 40, 120)
}

draw()
```

What it means

• function draw() { ... } defines the recipe; it does not run yet. Its body is indented by two spaces.
• draw() with parentheses runs it. Each run paints the sky first, which wipes the old picture.

Your turn

Wrap all the drawing lines in function draw() { ... } (indented by two spaces) and call draw() after it.

Skills: Functions

← A word on the canvas A list of words →

All steps

1. A sky for the words
2. The ground
3. A word on the canvas
4. A function that draws
5. A list of words
6. Make them fall
7. The game loop
8. A new word from the list
9. Let it rain
10. Gone past the ground
11. Lock on to a word
12. Listen to the keyboard
13. Letter by letter
14. Half a word in yellow
15. Let go of a lost word
16. Lives
17. Hearts
18. Score
19. Out of lives
20. Freeze the game
21. The game over panel
22. Play again
23. Levels
24. Faster and faster
25. Best score
26. Accuracy
27. Words per minute
28. Your speed at the end
29. Where the keys go
30. Draw the keyboard
31. Light up the next key
32. Tap the keys
33. Build it yourself: change your mind