#define hijau 13
#define biru 12
#define merah 11

int status=0;
void setup() {
  // put your setup code here, to run once:
pinMode(hijau, OUTPUT);
pinMode(biru, OUTPUT);
pinMode(merah, OUTPUT);
pinMode(7, INPUT);

digitalWrite(hijau, LOW);
digitalWrite(biru, LOW);
digitalWrite(merah, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
  // delay(300);
  if(digitalRead(7)==HIGH)
  {
    status++;
    delay(300);
  }
  
  if (status==1)
  {
    digitalWrite(hijau, HIGH);
  }
  else if (status==2) 
  {
  digitalWrite(biru, HIGH);
  }
  else if (status==3) 
  {
  digitalWrite(merah, HIGH);
  }
  else
  {
    status=0;
    digitalWrite(hijau, LOW);
    digitalWrite(biru, LOW);
    digitalWrite(merah, LOW);
  }
}