int led1 = 2;
void setup() {
  Serial.begin(9600);
  pinMode(led1, OUTPUT);
  }
void loop() {
  for(int i = 0; i < 3; i++)
  {

    Serial.println("LED S");
    digitalWrite(led1, HIGH);
    delay(750);
    digitalWrite(led1, LOW);
    delay(500);
  }
  for(int j = 0; j < 3; j++)
  {
    Serial.println("LED 0");
    digitalWrite(led1, HIGH);
    delay(2000);
    digitalWrite(led1, LOW);
    delay(500);
  }
  for(int k = 0; k < 3; k++)
  {
    Serial.println("LED S");
    digitalWrite(led1, HIGH);
    delay(750);
    digitalWrite(led1, LOW);
    delay(500);
  }
  delay(3000);
}