#define merah 1
#define kuning 2
#define hijau 3
#define tombol 7
int status = 0;
void setup() {
  // put your setup code here, to run once:
pinMode (merah, OUTPUT);
pinMode (tombol, INPUT);
pinMode (kuning, OUTPUT);
pinMode (hijau, OUTPUT);
digitalWrite(merah, LOW);
digitalWrite(kuning, LOW);
digitalWrite(hijau, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
if(digitalRead(tombol)==HIGH){
  status++;
  delay(100);
}
if(status==1){
  digitalWrite(merah, HIGH);
}
if(status==2){
  digitalWrite(kuning, HIGH);
}
if(status==3){
  digitalWrite(hijau, HIGH);
}
if(status==4){
  status=0;
}
else{
  digitalWrite(merah, LOW);
  digitalWrite(kuning, LOW);
  digitalWrite(hijau, LOW);
}
}