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it unlocks many cool features!
- local oSensor = peripheral.wrap("top")
- while 1 do
- local iNb = #oSensor.getPlayers()
- print(iNb)
- if iNb==0 then
- redstone.setOutput("back",false)
- else
- redstone.setOutput("back",true)
- end
- sleep(1)
- end
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