[SOLVED] How do i make a timer in lua?

[NiLSPACE]

Use cWorld:ScheduleTask for that.
Something like this:

-- One second is 20 ticks
local callback;
callback = function(a_World)
	-- Spawn a mob
	
	-- Reschedule the callback again.
	a_World:ScheduleTask(20, callback)
end

world:ScheduleTask(20, callback)