Bleeding brakes is best done with an assistant who steps on the brake
pedal while you open each caliper's bleeder. So the routine is for you
to open the bleeder and call for your friend to press the pedal then you
close the bleeder and only then do they release the pedal and that cycle
is repeated until only fluid bleeds out of the caliper. Then you check
and refill the fluid level in the master cylinder so no new air gets
pumped into the system.
Then on to the next wheel.
Don't reuse the expelled brake fluid.