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- void setup() {
- pinMode(2, INPUT_PULLUP);
- pinMode(3, INPUT_PULLUP);
- pinMode(4, INPUT_PULLUP);
- pinMode(5, INPUT_PULLUP);
- pinMode(6, OUTPUT);
- pinMode(7, OUTPUT);
- pinMode(8, OUTPUT);
- pinMode(9, OUTPUT);
- }
- void loop() {
- int buttonPressed = 0;
- for (int i = 2; i < 6; i++) {
- if (digitalRead(i) == LOW) buttonPressed = i;
- }
- if (buttonPressed > 0) {
- digitalWrite(buttonPressed + 4, HIGH);
- tone(10, 1000, 50);
- delay(500);
- noTone(10);
- digitalWrite(buttonPressed + 4, LOW);
- }
- }
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