void setup() {
  // put your setup code here, to run once:
  pinMode(6,OUTPUT);
  pinMode(7,OUTPUT);
  pinMode(8,OUTPUT);
  pinMode(9,OUTPUT);
  pinMode(11,OUTPUT);
  pinMode(12,OUTPUT);

  digitalWrite(7,LOW);
  digitalWrite(9,LOW);
  digitalWrite(12,LOW);

  }

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(6,HIGH);
  delay(1000);
  digitalWrite(6,LOW);
  delay(1000); 
  digitalWrite(8,HIGH);
  delay(1000);
  digitalWrite(8,LOW);
  delay(1000); 
  digitalWrite(11,HIGH);
  delay(1000);
  digitalWrite(11,LOW);
  delay(1000); 
}