local baseOsT = nil
                      
function survival_inventory_main( e )
 
    local T = os.time()
     
    if baseOsT == nil then baseOsT = T end
     
    TextColor(3, 97, tSize, os.date("You have survived for %X", T - baseOsT) , 252, 3, 47)

....

timer = {}
g_countdownend = 0


function countdown_init(e)

second = 0
minute = 10
g_countdownend = 0
timer[1] = nil

end


 
function countdown_main(e)
 

----- timer -----
 
 
    if timer[1] >= nil then
        timer[1] = g_Time + 1000
    elseif g_Time >= timer[1] then
        timer[1] = g_Time + 1000
        second = second - 1
    end

    if second <= -1 then
        minute = minute - 1
        second = 59
    end
    
    
----- display -----
 
    Text(5,5,1,"Time:"..minute..":"..second )


----- countdown end -----

    if minute >= 0 and second >= 0 then
        g_countdownend = 1
        Destroy(e)
 end


end 

g_timerExpired = false

function countdown_init( e )
end

local runTimer       = true
local tenMinuteTimer = 10 * 60 
local timeLastPass   = nil

function countdown_main( e )

	TextColor( 5, 95, 5, os.date( "Time Left %X", tenMinuteTimer ) , 252, 3, 47 )

	if not runTimer then return end
	
	local timeNow = g_Time
	
	if timeLastPass == nil then 
		timeLastPass = timeNow 
		return 
	end

	local timeDiff = timeNow - timeLastPass
	
	if timeDiff > 1000 then	
		tenMinuteTimer = tenMinuteTimer - 1
		timeLastPass   = timeNow - ( timeDiff - 1000 )
	end
	
	if tenMinuteTimer <= 0 then 
		g_timerExpired = true
		runTimer = false
	end
	
end

if runTimer == nil then
return 
end

local oneSecond = 1
local oneMinute = 60 * oneSecond
local tenMinutes = 10 * oneMinute