void setup()
{
pinMode(13, OUTPUT);
pinMode(3, OUTPUT);
pinMode(2, INPUT_PULLUP);
pinMode(1, INPUT_PULLUP);
}
void loop()
{
while (digitalRead(2)) {}
digitalWrite(13, HIGH);
digitalWrite(3, HIGH);
while (digitalRead(1)) {}
digitalWrite(13, LOW);
digitalWrite(3, LOW);
}
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