#include <Servo.h>
Servo motor;
int pwmout=3;
int start=0;
void setup ()
{
motor.attach (pwmout);
motor.write (start);
delay (2000);
}
void loop ()
{
motor.write (45);
delay(1000);
motor.write (145);
delay (1000);
motor.write (30);
delay (1000);
}