pxt-calliope/docs/blocks/logic/if.md
Sam El-Husseini e3975e65e5 pxt-microbit Accessibility PR (#529)
* Accessibility changes
2017-09-07 13:42:08 -07:00

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# @extends
## #examples
## Example: adjusting screen brightness
If the [light level](/reference/input/light-level) is `< 100`, this code sets the brightness to `255` when the button A is pressed:
```blocks
input.onButtonPressed(Button.A, () => {
if(input.lightLevel()<100){
led.setBrightness(255);
}
})
```