How to Release the Redundant Brake Oil from the Caliper Bleed Nipples?

How to Release the Redundant Brake Oil from the Caliper Bleed Nipples?

Please be sure the air in the brake fluid of caliper has been absolutely exhaused. Then, fix the bleed nipples first before doing the step below

Please follow the instruction back and forth at least three times to make sure there is no more brake oils coming out.