eli5: How did the static state of singularity turn into a big bang if there was no time /action?

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sorry for repeating the question, i did read the other replies ,but they don’t answer the point i’m looking for..
Singularity as i understand it =No time = no movement =stasis.

How could that state of no time, stasis change into a big bang ! i read that the causality and time started with the big bang ! ,but if that’s true and accepted, how would the big bang itself possibly happen (for the lack of a better word ) WITHOUT TIME .. !

In: Physics