from MotorBridgeI import MotorBridgeCape
from time import sleep

servo_name  =  1
frequency   =  50

motor = MotorBridgeCape()
motor.ServoInit( servo_name, frequency )

for angle in 0, 45, 90, 135, 180, 135, 90, 45, 0:
    sleep( 0.5 )
    motor.ServoMoveAngle( servo_name, angle )