void setup() {
  pinMode(10, OUTPUT);
pinMode(9, OUTPUT);
pinMode(8, OUTPUT);
}
void loop()  {
digitalWrite(10, HIGH);  
delay(5000);
digitalWrite(10,LOW);
delay(10);

digitalWrite(9, HIGH);
delay(5000);
digitalWrite(9, LOW);
delay(10);

digitalWrite(8, HIGH);
delay(5000);
digitalWrite(8, LOW);
delay(6500);
}