while true do
    local detector = peripheral.find("playerDetector")
    local playerList = detector.getPlayersInRange(7)

    count = 0
    for _ in pairs(playerList) do count = count + 1 end
    print("count")
    if(count == 0) then
        redstone.setOutput("top", false)
		print("no")
        end

    for k,v in pairs(playerList) do
		redstone.setOutput("top", true)
		print("yes")
		end
    end