#define LEDMerah 2
#define LEDKuning 4
#define LEDHijau 6

void setup() {
  // put your setup code here, to run once:
pinMode(LEDMerah, OUTPUT);
pinMode(LEDKuning, OUTPUT);
pinMode(LEDHijau, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(LEDMerah, HIGH);
digitalWrite(LEDKuning, HIGH);
digitalWrite(LEDHijau, HIGH);

delay(300);
digitalWrite(LEDMerah, LOW);
digitalWrite(LEDKuning, LOW);
digitalWrite(LEDHijau, LOW);
delay(300);
}