//Rangga A D 
//4T-JTD 
//244101067012

const int redLED = 2;  // nomor pin led merah
const int yellowLED = 4;  // nomor pin led kuning
const int greenLED = 15;  // nomor pin led hijau

void setup() {
    pinMode(redLED, OUTPUT); // ketiga led sbg output
    pinMode(yellowLED, OUTPUT);
    pinMode(greenLED, OUTPUT);
}

void loop() {
    digitalWrite(redLED, HIGH); // kondisi led merah menyala, kuning dan hijau mati selama 2detik
    digitalWrite(yellowLED, LOW); 
    digitalWrite(greenLED, LOW); 
    delay(2000);

    digitalWrite(redLED, LOW); // kondisi led kuning menyala, merah dan hijau mati selama 2detik
    digitalWrite(yellowLED, HIGH); 
    digitalWrite(greenLED, LOW); 
    delay(2000);

    digitalWrite(redLED, LOW); // kondisi led hijau menyala, kuning dan merah mati selama 2detik
    digitalWrite(yellowLED, LOW); 
    digitalWrite(greenLED, HIGH); 
    delay(2000);

}