Workshop › 15 Puzzle › Step 4 of 27

A function that draws

What we are doing

The picture will change after every slide, so it will be drawn again and again. We put the drawing lines in a function named draw, and call it after reset().

```js
function draw() {
  ctx.fillStyle = '#292524'
  ctx.fillRect(0, 0, canvas.width, canvas.height)
}

reset()
draw()
```

What it means

• function draw() { ... } defines the recipe; it does not run yet.
• draw() under reset() runs it once the board is ready.

Your turn

Wrap the two drawing lines in function draw() { ... } and write draw() under the reset() call at the bottom.

Skills: Functions

← Paint the table Row and column →

All steps

1. A board in one list
2. The canvas and the pen
3. Paint the table
4. A function that draws
5. Row and column
6. Where each square is
7. Draw one tile
8. The number on the tile
9. All the tiles
10. Draw again and again
11. The solved board from N
12. Neighbours
13. Slide a tile
14. Click a tile
15. Arrow keys
16. Count the moves
17. Shuffle with real slides
18. Which boards can be solved?
19. Is it solved?
20. Remember the slide
21. Count the frames
22. Smooth sliding
23. Solved!
24. Show the win
25. Play again
26. A record to beat
27. Build it yourself: a timer