int ledMerah = 8;
int ledKuning = 9;
int ledHijau = 10;
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
pinMode(ledMerah, OUTPUT);
pinMode(ledKuning, OUTPUT);
pinMode(ledHijau, OUTPUT);
}
void loop() {
// put your main code here, to run repeatedly:
digitalWrite(ledMerah, HIGH);
digitalWrite(ledKuning, LOW);
digitalWrite(ledHijau, LOW);
Serial.println("merah menyala");
delay(3000);
digitalWrite(ledMerah, LOW);
digitalWrite(ledKuning, HIGH);
digitalWrite(ledHijau, LOW);
Serial.println("kuning menyala");
delay(1000);
digitalWrite(ledMerah, LOW);
digitalWrite(ledKuning, LOW);
digitalWrite(ledHijau, HIGH);
Serial.println("hijau menyala");
delay(3000);
}