if(distance <= 20)
  {
    digitalWrite(led,HIGH);
    digitalWrite(led2,LOW);

    for(; pos < 180; pos++)
    {
      myservo.write(pos);
      myservo1.write(pos);
      myservo2.write(pos);

      delay(5);
    }

    for(pos = 180; pos > 0; pos--)
    {
      myservo.write(pos);
      myservo1.write(pos);
      myservo2.write(pos);

      delay(5);
    }