import RPi.GPIO as GPIO
from RPIO import PWM
import time

#GPIO.cleanup()
GPIO.setmode(GPIO.BCM)
servo = PWM.Servo()

YELLOW = 18

servo.set_servo(18,250)
time.sleep(2)

servo.set_servo(18,500)
time.sleep(2)

servo.set_servo(18,750)
time.sleep(2)

servo.set_servo(18,1000)
time.sleep(2)

servo.set_servo(18,1250)
time.sleep(2)

servo.set_servo(18,1500)
time.sleep(2)

GPIO.cleanup()