import RPi.GPIO as IO
IO.setwarning(False)
IO.setmode(IO.BOARD)
IO.setup(8,IO.IN)
IO.setup(3,IO.OUT)

while 1:
    if(IO.input(8)==True):
        print("Obstacle detected!!!")
        IO.output(3,True)
    else:
        print("Obstacle not detectedc")
        IO.output(3,False)