void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  
  pinMode(12, OUTPUT);//red
  pinMode(14, OUTPUT);//yellow
  pinMode(27, OUTPUT);//green

  pinMode(18, OUTPUT);  //red
  pinMode(19, OUTPUT); //yellow
  pinMode(21, OUTPUT); //green
}

void loop() {
  int c=digitalRead(4);
  if(c==1){
  digitalWrite(12, HIGH);
  digitalWrite(21, HIGH);
  delay(1000);

  digitalWrite(12, LOW);
  digitalWrite(21,LOW);
  
  digitalWrite(14, HIGH);
  digitalWrite(19, HIGH);
  delay(1000);

  digitalWrite(14, LOW);
  digitalWrite(19, LOW);

  digitalWrite(27, HIGH);
  digitalWrite(18, HIGH);
  delay(1000);
  digitalWrite(27, LOW);
  digitalWrite(18,LOW);
  delay(1000);
  }
  else{
    digitalWrite(12, LOW);
    digitalWrite(14, LOW);
    digitalWrite(27, LOW);
    digitalWrite(18, LOW);
    digitalWrite(19, LOW);
    digitalWrite(21, LOW);
  }
}