void setup() {
  // put your setup code here, to run onp
pinMode(2,OUTPUT);pinMode(7,OUTPUT);pinMode(8,OUTPUT);pinMode(10,OUTPUT );

}
void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(2,LOW);
digitalWrite(7,LOW);
delay(2000);
digitalWrite(2,HIGH);
digitalWrite(7,HIGH);
delay(2000);
digitalWrite(8, LOW);
delay(2000);
digitalWrite(8,HIGH);
delay(200);
digitalWrite(10,HIGH);
}