of fig4 simultaneously with motor shutdown a timer is activated the timer deactivates the motor 12 for a predetermined period of time e g forty five minutes longer or shorter rest times may be programmed as desired when the predetermined period of shutdown time has elapsed as indicated by the seventh step 68 of fig5 the control module 36 will reactivate the pump motor 12 for a short preprogrammed period or more accurately a short preprogrammed number of pulse detections as indicated by the eighth step 69 of fig5 by counting pulses during motor operation rather than operating the motor for a predetermined period of time the proper number of revolutions and therefore pump cycles is assured which might not be the case if the motor were to operate more slowly due to low voltage or some other reason this operation continues until electrical power is discontinued to the circuit by shutting off the power switch 34 or otherwise interrupting electrical power to the device it will be seen in fig4 that the light passage 56 is located toward one end of the diaphragm actuator 52 thus when the light passage 56 is aligned with the light source 58 and receptor 60 the actuator 52 and diaphragm attached thereto is positioned toward one extreme of their travel i e toward the motor 12 as shown in fig4 thus if the light receptor 60 detects light the system continues to operate or reactivates the motor 12 to drive the gear reduction output shaft 46 another quarter turn thereby repositioning the diaphragm actuator 52 and diaphragm neutrally between the two extremes of travel if no light is detected by the receptor 60 when power to the.