22 lines
509 B
Markdown
22 lines
509 B
Markdown
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# Reverse Beeper Activity 2
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```blocks
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let beep = false
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beep = true
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control.runInBackground(function () {
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motors.largeB.setSpeed(-20)
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motors.largeC.setSpeed(-20)
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sensors.ultrasonic4.pauseUntil(UltrasonicSensorEvent.ObjectNear)
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motors.stopAllMotors()
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beep = false
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})
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control.runInBackground(function () {
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while (beep) {
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if (sensors.ultrasonic4.distance() < 20) {
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music.playTone(440, sensors.ultrasonic4.distance())
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loops.pause(50)
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}
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}
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})
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```
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