#define LED 13
#define LED1 12
#define LED2 11
#define LED3 10
#define LED4  9
void setup() {
pinMode(LED, OUTPUT);
pinMode(LED1, OUTPUT);
pinMode(LED2,OUTPUT);
pinMode(LED3,OUTPUT);
pinMode(LED4,OUTPUT);

}

void loop() {

  digitalWrite(LED, HIGH);
  delay(2000);
   digitalWrite(LED, LOW);
 digitalWrite(LED1, HIGH);
  delay(2000);
  digitalWrite(LED1, LOW);
  digitalWrite(LED2, HIGH);
  delay(2000);
digitalWrite(LED2, LOW);
digitalWrite(LED3, HIGH);
delay(2000);
digitalWrite(LED3, LOW);
digitalWrite(LED4, HIGH);
delay(2000);
digitalWrite(LED4, LOW);


}