i know this has been answered im a newbie i dont get it.
how do we add a timer thought out your game
You can use a custom plugin, the Time Manager plugin.
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Not is my intention doing any type of minimodding, but please, insert a title before "How do I". Your post need a title. "How do I" is only an default to start before your title.
Can you just create a global object - a sprite which does nothing - and attach a timer to it ?
Yes! Just use the "Timer" behavior.