const int LED1=1;
const int LED2=2;
const int LED3=3;

void setup() {

pinMode(LED1, OUTPUT);

}

void loop() {

}

digitalWrite(LED1, HIGH);
delay(1500);
digitalWrite(LED1, LOW);
delay(500);
digitalWrite(LED1, HIGH);
delay(500);
digitalWrite(LED1, LOW);
delay(500);
digitalWrite(LED1, HIGH);
delay(500);
digitalWrite(LED1, LOW);
delay(500);
digitalWrite(LED1, HIGH);
delay(500);
digitalWrite(LED1, LOW);
delay(500); 


digitalWrite(LED2, HIGH);
delay(1);
digitalWrite(LED2, LOW);
delay(1);

digitalWrite(LED3, HIGH);
delay(1);
digitalWrite(LED3, LOW);
delay(1);