#define sw1 13
#define RELAY1 12
#define RELAY2 11
#define RELAY3 10
void setup() {
  // put your setup code here, to run once:
  pinMode(sw1, INPUT);
  pinMode(RELAY1, OUTPUT);
  pinMode(RELAY2, OUTPUT);
  pinMode(RELAY3, OUTPUT);
  Serial.begin(9600);
  Serial.println("Holl you my fan");

}

bool sw1_val;
void loop() {
  // put your main code here, to run repeatedly:
  sw1_val=digitalRead(sw1);
  if(sw1_val==LOW)
  {
    digitalWrite(RELAY1, HIGH);
    delay(1000);
    digitalWrite(RELAY1, LOW);
    digitalWrite(RELAY2, HIGH);
    delay(1000);
    digitalWrite(RELAY2, LOW);
    digitalWrite(RELAY3, HIGH);
    delay(1000);
    digitalWrite(RELAY3, LOW);
    return;
  
  }
else{
  digitalWrite(RELAY1, LOW);
  digitalWrite(RELAY2, LOW);
  digitalWrite(RELAY3, LOW);
  

  }
  
}