Collect all the pigs and place them on the brown bit to close the pen. This will let you build what looks to me like a sink, and you can collect a pipe from said sink. Install the bit of pipe, run up the ladder to turn the h2o on, and voila!
"whoso would be a man must be a nonconformist, ...nothing is at last sacred but the integrity of your own mind" Emerson
Go up that ladder yo created. Once up there you will find a block near the edge. Push it over and it will break on the ground. Form those pieces you'll be able to build a pipe. Once done you get up the ladder once again and you must turn the wheel. Then the water will flow on the guy (joshamee gibbs).