#include <Servo.h>

Servo servoOBJ[1];

int pos = 0;
int i;

void setup() {
  // put your setup code here, to run once:
  servoOBJ[1].attach(3);
}

void loop() {
  // put your main code here, to run repeatedly:
  for(i=0; i<179; i++)
  {
    servoOBJ[1].write(i);
    delay(25);
  }
  for(i=180; i>1; i--)
  {
    servoOBJ[1].write(i);
    delay(15);
  }

}