void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  //machine 1
  pinMode(4 , OUTPUT);
  pinMode(2 , OUTPUT);
  pinMode(15 , OUTPUT);
 //machine 2
  pinMode(13 , OUTPUT);
  pinMode(12 , OUTPUT);
  pinMode(26 , OUTPUT);

  
}

void loop() {
  digitalWrite(4, HIGH);
  digitalWrite(26, HIGH);
  delay(2000);
  digitalWrite(4, LOW); 
  digitalWrite(26, LOW);
  
  digitalWrite(12, HIGH);
  digitalWrite(2, HIGH);
  delay(2000);
  digitalWrite(12, LOW); 
  digitalWrite(2, LOW);
  
  digitalWrite(13, HIGH);
  digitalWrite(15, HIGH);
  delay(2000);
  digitalWrite(13, LOW); 
  digitalWrite(15, LOW);
  delay(2000);

}