local radars = {'radar_0', 'radar_2'}
local currentSecond = 0
local rsDoorSide = 'back'
local allowedVisitors = { 'csmit195', 'YorickNL', 'blackfiredesigns' }

function initiate()
    local newRadars = {}
    for _, radar in ipairs(radars) do
        newRadars[_] = peripheral.wrap(radar)
    end
    radars = newRadars
    while true do
        loop()
        currentSecond = currentSecond + 1
        sleep(1)
    end
end

function loop()
    -- Every 2 Seconds to reduce amount of sensor calls and potentially limit lag
    if ( currentSecond % 2 == 0 ) then
        -- Probe Sensors
        local isVerified
        for _, radar in ipairs(radars) do
            for index, player in ipairs(radar.getPlayers()) do
                for __, whitelistedPlayer in ipairs(allowedVisitors) do
                    if ( player.name == whitelistedPlayer ) then
                        setDoorState(true)
                        isVerified = true
                    end
                end
            end
        end
        if ( not isVerified ) then
            setDoorState(false)
        end
    end
end

function setDoorState(state)
    rs.setOutput(rsDoorSide, state)
end

initiate()