void setup() {
  // put your setup code here, to run once:
pinMode(2, OUTPUT);
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(9, OUTPUT);
}
void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(2, HIGH);
digitalWrite(7, HIGH);
digitalWrite(8,HIGH);
delay(2000);
digitalWrite(2, LOW);
digitalWrite(7,LOW );
digitalWrite(8,LOW );
delay(1000);
digitalWrite(9, HIGH);
}