intintintint redPin = 13;     // Pin LED merah
int yellowPin = 12;  // Pin LED kuning
int greenPin = 11;   // Pin LED hijau
void setup() {
 pinMode(redPin, OUTPUT);
 pinMode(yellowPin, OUTPUT);
 pinMode(greenPin, OUTPUT);
}
void loop() {
 // Lampu Hijau Menyala
 digitalWrite(greenPin, HIGH);
 delay(5000);  // 5 detik
 digitalWrite(greenPin, LOW);
 // Lampu Kuning Menyala
 digitalWrite(yellowPin, HIGH);
 delay(2000);  // 2 detik
 digitalWrite(yellowPin, LOW);
 // Lampu Merah Menyala
 digitalWrite(redPin, HIGH);
 delay(5000);  // 5 detik
 digitalWrite(redPin, LOW);
}