PlayerSensor

local arg = ...

local function getPeripheral()
    print("Searching sensor...")
    local sides = {"top", "bottom", "right", "left", "back", "front"}
    local sensor = peripheral.wrap("top")
    local i = 1
    while sensor == nil do
        sensor = peripheral.wrap(tostring(sides[i]))
        i = i + 1
        if i % 7 == 0 then
            i = 1
        end
        sleep(0)
    end
    print("Sensor found !")
    return sensor
end

local function displayAllAttributes(tab)
    for k,v in ipairs(tab) do
        print(k)
        print(type(v))
        if type(v) == "table" then
            displayAllAttributes(v)
        else
            print(v)
        end
    end
end

local function getNames(sensor)
    players = {}
    i = 1
    for _,v in ipairs(sensor.getPlayers()) do
        players[i] = v.name
        i = i + 1
    end
    return players
end

local function displayPlayersInRange(sensor, times)
    local i = 0
    while i ~= times do
        term.clear()
        for _,players in ipairs(getNames(sensor)) do
            print(players)
        end
        i = i + 1
        sleep(1)
    end
end

local function main()
    local sensor = getPeripheral()
    if arg == nil then
        displayPlayersInRange(sensor, -1)
    else
        displayPlayersInRange(sensor, arg)
    end
end

main()