#include <Servo.h> 
Servo myservo;
int pos = 0; 
int L1 = 12;
int L2 = 11;
void setup() {
  myservo.attach(9); 
  pinMode(L1, OUTPUT);
  pinMode(L2, OUTPUT);
  Serial.begin(9600);
}
void loop() {
  for(pos = 120; pos=0; pos+=1)
  {
    myservo.write(pos);
    delay(10);
    digitalWrite(L1, HIGH);
    digitalWrite(L2, LOW);
  }
  for(pos = 0; pos=120; pos-=1) 
  {
    myservo.write(pos);
    delay(10); 
    digitalWrite(L1, LOW);
    digitalWrite(L2, HIGH);
  }
}