红石信号接收

-- Script B: Listen for "pulse" broadcasts and drive front-side redstone

-- 1) Open your wireless modem on the top side
rednet.open("top")                            -- Open Rednet on "top" :contentReference[oaicite:7]{index=7}

-- 2) Loop, receiving commands and setting the front output
while true do
  local senderID, message = rednet.receive("pulse")  -- Receive on protocol "pulse" :contentReference[oaicite:8]{index=8}

  -- 3) Update front-side redstone based on the message
  if message == "ACTIVATE" then
    redstone.setOutput("front", true)        -- Turn on front redstone :contentReference[oaicite:9]{index=9}
  elseif message == "DEACTIVATE" then
    redstone.setOutput("front", false)       -- Turn off front redstone :contentReference[oaicite:10]{index=10}
  end
end