int lamp1 = 13;
int lamp2 = 7;
void setup() {
  Serial.begin(9600);
  pinMode(lamp1, OUTPUT);
  pinMode(lamp2, OUTPUT);

}

void loop() {
digitalWrite(lamp1, HIGH);
  delay(500);
  digitalWrite(lamp1, LOW);
  delay(500);

  digitalWrite(lamp2, HIGH);
  delay(300);
  digitalWrite(lamp2, LOW);
  delay(300);
}