GPIO.setmode(GPIO.BOARD)
GPIO.setup(11, GPIO.OUT)#To L239 Pin2
GPIO.setup(12, GPIO.OUT) #To L239 Pin7
GPIO.setup(07, GPIO.OUT) #L293 Enable Pin1
pwm=GPIO.PWM(07, 800) #Seto GPIO No.7 as PWM at 800Hz

def F():
# Wheels Forward
    pwm.start(100.0)
    pwm.ChangeDutyCycle(100.0)
    GPIO.output(11, True)
    GPIO.output(12, False)
    GPIO.output(07, True) #Enable Pin ON