void setup() {
  // put your setup code here, to run once:  
  pinMode(7, OUTPUT);
  pinMode(4,OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
   digitalWrite(7, HIGH);
  delay(300);
  digitalWrite(7, LOW);
  delay(300);
  digitalWrite(4, HIGH);
  delay(300);
  digitalWrite(4, LOW);
  delay(300);
  digitalWrite(4,HIGH) ;
  delay(300);
  digitalWrite(4,LOW);
  delay(300);
  digitalWrite(1, HIGH);
  delay(300);
  digitalWrite(1, LOW);
  delay(300);
  digitalWrite(1, HIGH);
  delay(300);
  digitalWrite(1, LOW);
  delay(300);
  digitalWrite(1, HIGH);
  delay(300);
  digitalWrite(1, LOW);
  delay(300);
}