pxt-calliope/olddocs/lessons/game-counter/activity.md
Tom Ball f4eca66648 move lessons out of web site
will move select lessons back to "educators" section
2016-06-14 11:49:58 -04:00

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# game counter activity
Have you ever tried to create a game counter? The concept is fairly simply: increase the game `score` with `on button pressed` .
Let's start by adding `on button (A) pressed` will run each time the user presses A. Let's add a line of code that increments `score` by `1`.
```blocks
input.onButtonPressed(Button.A, () => {
game.addScore(1);
});
```
Let's add a `add points to score` block to keep track of the current count. Since the count will change with the `add points to score` blocks, add a game block `score` to display the count on screen.
```blocks
input.onButtonPressed(Button.A, () => {
game.addScore(1);
basic.showNumber(game.score())
});
```
### ~avatar boothing
Excellent, you're ready to continue with the [challenges](/lessons/game-counter/challenges)!
### ~