#define LED_merah 13
#define LED_kuning 12
#define LED_hijau 11
#define tombol 7

int status = 0;

void setup() {
  // put your setup code here, to run once:
pinMode(LED_merah, OUTPUT);
pinMode(tombol, INPUT);
pinMode(LED_kuning, OUTPUT);
pinMode(LED_hijau, OUTPUT);
digitalWrite(LED_merah, LOW);
digitalWrite(LED_kuning, LOW);
digitalWrite(LED_hijau, LOW);
}

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