Rpi PWM Example 01

import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO.setup(5,GPIO.OUT)
p=GPIO.PWM(5,50)
p.start(0)
try:
    while True :
        for x in range(0,101,5) :
            p.ChangeDutyCycle(x)
            time.sleep(0.1)
        for x in range(100,-1,-5) :
            p.ChangeDutyCycle(x)
            time.sleep(0.1)
except KeyboardInterrupt:
    pass
p.stop()
GPIO.cleanup()