void setup() {
  // put your setup code here, to run once:
  pinMode(23, OUTPUT);
  pinMode(22, OUTPUT);
  pinMode(21, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(23, HIGH);
  delay(7000);
  
  
  digitalWrite(22, HIGH);
  delay(3000);
  digitalWrite(23, LOW);
  digitalWrite(22, LOW);

  digitalWrite(21, HIGH);
  delay(10000);
  

  digitalWrite(22, HIGH);
  delay(3000);
  digitalWrite(22, LOW);
  digitalWrite(21, LOW);



  
 
}