GearShiftReceiver

output_side = "top"
raise_output = true
raise_message = "raise_lift"
lower_message = "lower_lift"
rednet_side = "back"

rs.setOutput(output_side, raise_output)

rednet.open(rednet_side)

while true do

    id, message = rednet.receive()

    if message == raise_message then

        rs.setOutput(output_side, raise_output)

    elseif message == lower_message then

        rs.setOutput(output_side, not raise_output)

    end

end