void setup() {
  pinMode(13, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(7, OUTPUT);
}
void loop() {
  digitalWrite(13, HIGH);
  delay(500);
  digitalWrite(13, LOW);
  delay(500);
  digitalWrite(7, HIGH);
  delay(600);
  digitalWrite(7, LOW);
  delay(600);
  digitalWrite(10, HIGH);
  delay(600);
  digitalWrite(10, LOW);
  delay(600);}