#define lampu 2
#define yellow 3
#define green 4

void setup() {
  pinMode(lampu, OUTPUT);
  pinMode(yellow, OUTPUT);
  pinMode(green, OUTPUT);

}

void loop() {
digitalWrite(lampu, HIGH);
delay(200);
digitalWrite(lampu, LOW);
delay(200);
digitalWrite(lampu, HIGH);
delay(200);
digitalWrite(lampu, LOW);
delay(1000);

}