#include<Servo.h>

Servo servo;

Servo servo2;

int  pos = 80;

void setup()

{

  servo.attach(9);

  servo2.attach(10);

}

void loop() {

  for (pos = 80; pos <= 110; pos += 1)

  {

    servo.write(pos);

    delay(50);

    //servo2.write(pos);

    //delay(50);

  }

  for (pos = 110; pos >= 80; pos -= 1)

  {

    //servo.write(pos);

   //delay(50);

    servo2.write(pos);

    delay(50);

  }