This is only one of a few contraptions that I was asked to share with all of you wonderful people. 

This automated Reed Farm is complete. All redstone wire has been run and only needs to be placed where you want it. 

This is not a new design and those who have played survival for any amount of time, have fiddled with this or similar designs. Remember to leave the sensor open to the sky for it to work properly. 

Please feel free to ask any questions or add comments as desired.

enjoy.