红石信号发射

-- Script A: On redstone change, broadcast ACTIVATE/DEACTIVATE

-- 1) Open your wireless modem on the top side
rednet.open("top")                            -- Open Rednet on "top" :contentReference[oaicite:2]{index=2}

-- 2) Loop, waiting for any redstone input change
while true do
  os.pullEvent("redstone")                    -- Wait for redstone event :contentReference[oaicite:3]{index=3}

  -- 3) Read the back-side redstone input
  if redstone.getInput("front") then           -- Get back-side input (boolean) :contentReference[oaicite:4]{index=4}
    rednet.broadcast("ACTIVATE", "pulse")     -- Broadcast activation on protocol "pulse" :contentReference[oaicite:5]{index=5}
  else
    rednet.broadcast("DEACTIVATE", "pulse")   -- Broadcast deactivation on protocol "pulse" :contentReference[oaicite:6]{index=6}
  end
end