A gland in some animals that allows for the animal to repeat specific moments in time.

A loop inside a loop, which is known as a nested loop.

prime a loop is that how mach time it executed either max time or minimum time

well you see a single loop circulation only goes through the heart and body one at a time meanwhile a double loop circulation does it all at the same time ,,, suss

The various limitations that you will be able to face will enable you to know that you have been caught in a temporal time loop.