local sensor = peripheral.wrap("top")
local mon = peripheral.wrap("monitor_4")

function securityCheck(masterName)
local playerList={}
    while true do
        PlayerList = sensor.getPlayers()
        if not next(PlayerList) then
            return "no"
        end
        for i in pairs(list) do
            p = list[i].name
                if (p == masterName) then
                    print("ok ", p)
                    return "yes"
                else
                    print("no ", p )
                    return "no"
                end
        end
    end
end


function cWrite(w,s,msg1,msg2,msg3,msg4,msg5,msg6,msg7,msg8)
msg1L = string.len(msg1)
msg2L = string.len(msg2)
msg3l = string.len(msg3)
msg4L = string.len(msg4)
msg5L = string.len(msg5)
msg6L = string.len(msg6)
msg7L = string.len(msg7)
msg8L = string.len(msg8)
xPos = (w-msg1L-msg2L-msg3L-msg4L-msg5L-msg6L-msg7L-msg8L)/2
	if s = "term" then
		term.setCursorPos(xPos)
		print(msg1,msg2,msg3,msg4,msg5,msg6,msg7,msg8)
	elseif s = "mon" then
		mon.write(msg1,msg2,msg3,msg4,msg5,msg6,msg7,msg8)
	else
		print("error, screen needed")
	end
end

cWrite(51, "mon", "test ", "does ","this work?")