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docs cleanup

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Peli de Halleux
2017-02-28 06:45:08 -08:00
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docs/projects/smiley-buttons.md
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# smiley buttons
![](/static/mb/projects/a2-buttons.png)
Use buttons to show a smiley or frowny face.
## Step 1
Use [show leds](/reference/basic/show-leds) to make a smiley face:
```blocks
basic.showLeds(`
. # . # .
. # . # .
. . . . .
# . . . #
. # # # .`
);
```
## Step 2
Add an input block for when [button A is pressed](/reference/input/button-is-pressed), and put a
frowny face inside it:
```blocks
basic.showLeds(`
. # . # .
. # . # .
. . . . .
# . . . #
. # # # .`
);
input.onButtonPressed(Button.A, () => {
basic.showLeds(`
. # . # .
. # . # .
. . . . .
. # # # .
# . . . #`
);
});
```
## Step 3
Now add blocks so that when [button B is pressed](/reference/input/button-is-pressed), a smiley appears:
```blocks
basic.showLeds(`
. # . # .
. # . # .
. . . . .
# . . . #
. # # # .`
);
input.onButtonPressed(Button.A, () => {
basic.showLeds(`
. # . # .
. # . # .
. . . . .
. # # # .
# . . . #`
);
});
input.onButtonPressed(Button.B, () => {
basic.showLeds(`
. # . # .
. # . # .
. . . . .
# . . . #
. # # # .`
);
});
```