Workshop › Tetris-style Blocks › Step 24 of 32

Points for lines

What we are doing

Clearing lines scores points, and more lines at once score much more: 100, 300, 500 and 800 for 1 to 4. We also count the cleared lines.

```js
const POINTS = [0, 100, 300, 500, 800] // for clearing 0, 1, 2, 3 or 4 lines at once

let score
let lines

  score = 0
  lines = 0

  score += POINTS[cleared]
  lines += cleared
```

What it means

• POINTS[n] is the score for clearing n lines at once.
• newGame starts both counters at 0.
• clearLines adds the points and the number of lines after removing them.

Your turn

1. Under SHAPES write POINTS.
2. Above let state write let score and let lines.
3. In newGame, under the board = ... line, set both to 0.
4. In clearLines, at the end, add the points and the lines.

Skills: Game states, Arrays and objects

← Clear full rows The side panel →

All steps

1. The well
2. The board as rows of numbers
3. Draw one cell
4. Draw the whole board
5. The number is the color
6. A piece is a small grid
7. A list of shapes
8. All seven pieces
9. Does it fit inside the well?
10. Blocks are in the way
11. Try, then move
12. Move with the arrows
13. Turn a matrix
14. Turn with Up
15. Wall kicks
16. Falling by itself
17. A random piece at the top
18. Land and lock
19. One function starts a game
20. When the pile reaches the top
21. Game Over on screen
22. Play again
23. Clear full rows
24. Points for lines
25. The side panel
26. Levels
27. Faster every level
28. A fair bag of pieces
29. The next piece
30. Drop it
31. The ghost piece
32. Build it yourself: hold a piece