int LED1=13;
int LED2=12;
int LED3=11;



void setup() {
 
  pinMode(LED1,OUTPUT);
  pinMode(LED2,OUTPUT);
  pinMode(LED3,OUTPUT);
}

void loop() {
  digitalWrite(LED1,HIGH);
  delay(200);
  digitalWrite(LED2,HIGH);
   delay(200);
    digitalWrite(LED3,HIGH);
    delay(200);
    digitalWrite(LED1,LOW);
    delay(300);
    digitalWrite(LED2,LOW);
    delay(300);
    digitalWrite(LED3,LOW);
    delay(300);

    }