If the fluid that comes out of the brake is discolored, disconnect
the system and replace the fluid, then begin the bleeding process
again. If the fluid is consistently colored, push the fluid from the
bottom syringe back to the top syringe. Again, be sure to stop
pushing the fluid before the air bubbles in the syringe make it into
the system. Once finished, close the red plastic hose clamp to
close the syringe.
Pull gently on the plunger of the top syringe to create a vacuum.
This will pull some additional air bubbles from the system. Repeat
this step a few times until nearly all air bubbles are removed.