problem bleeding back brakes

the two person method works best, if you cant find a helper try this
with all bleeders closed, find a length of pipe, 2X4, anything that you can use to press the brake pedal all the way down then wedge between the pedal and the seat or seat frame, with the pedal held in the fully depressed position go around back and open the bleeder, close bleeder remove wedge from pedal and repeat, continue repeating until only clean new brake fluid comes out of the bleeder, dont forget to check and refill the master cylinder every few cycles then go on to the next wheel