int ledmerah = 5;
int ledhijau = 2;
int ledkuning = 4;

void setup() {
  // put your setup code here, to run once:
  pinMode(ledmerah, OUTPUT);
  pinMode(ledhijau, OUTPUT);
  pinMode(ledkuning, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(ledmerah, HIGH);
  delay(2000);
  digitalWrite(ledmerah, LOW);

  digitalWrite(ledkuning, HIGH);
  delay(2000);
  digitalWrite(ledkuning, LOW);

  digitalWrite(ledhijau, HIGH);
  delay(2000);
  digitalWrite(ledhijau, LOW);


}