pxt-ev3/docs/coding/ignition.md
Peli de Halleux f0821f8d6c cherry-pick Cooperate (#985)
* cooperate pause

* fix math

* update lastPause before pausing

* faster cooperation

Co-authored-by: Peli de Halleux <peli@DESKTOP-5B7QRAM.corp.microsoft.com>
2020-08-21 06:09:01 +02:00

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Markdown

# Ignition
Explore sensor events and sensor status.
## Activity 1
Wait for a touch sensor press or ultrasonic object detection. Show an expression on the screen when they happen.
```blocks
sensors.touch1.onEvent(ButtonEvent.Pressed, function () {
brick.showImage(images.eyesDizzy)
})
sensors.ultrasonic4.onEvent(UltrasonicSensorEvent.ObjectDetected, function () {
brick.showImage(images.eyesTiredMiddle)
})
brick.showImage(images.eyesSleeping)
```
## Activity 2
Play some motor sounds if touch sensor `1` is pressed at the same moment when and object comes close.
```blocks
while (true) {
if (sensors.touch1.isPressed() &&
sensors.ultrasonic4.distance() < 10) {
music.playSoundEffectUntilDone(sounds.mechanicalMotorStart)
music.playSoundEffectUntilDone(sounds.mechanicalMotorIdle);
}
}
```
## Activity 3
Play some motor sounds if touch sensor `1` is pressed when both the `enter` button is pressed on the brick and an object comes close.
```blocks
while (true) {
if (sensors.ultrasonic4.distance() < 10 &&
sensors.touch1.isPressed() &&
brick.buttonEnter.isPressed()) {
music.playSoundEffectUntilDone(sounds.mechanicalMotorStart)
music.playSoundEffectUntilDone(sounds.mechanicalMotorIdle);
}
}
```