Seconds timer.

-- Globals Section
MyAddon_updateSeconds = 5; --How many seconds per update.
MyAddon_DelayTime = 0; --dont change.

-- Functions Section
function MyAddon_OnUpdate(elapsed)
	local MyAddon_CurrentTime = GetTime();
	if (MyAddon_CurrentTime >= MyAddon_DelayTime) then	MyAddon_DelayTime = (MyAddon_CurrentTime + MyAddon_updateSeconds);
 	  	-- Your update code here
 	end
end