pxt-ev3/docs/coding/ignition-3.md

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# Ignition Activity 3
```blocks
while (true) {
if (sensors.ultrasonic4.distance() < 10 &&
sensors.touch1.wasPressed() &&
brick.buttonEnter.wasPressed()) {
music.playSoundEffectUntilDone(sounds.mechanicalMotorStart)
music.playSoundEffectUntilDone(sounds.mechanicalMotorIdle);
}
pause(1);
}
```