twinkling
twin-kling
adjective
Shining with a light that rapidly brightens and dims repeatedly.
"We admired the twinkling lights of the city."
noun
A very brief moment, or a sparkling, intermittent light.
"It happened in a twinkling of an eye."
Thesaurus
Synonyms: blink of an eye, heartbeat, wink, split second, jiffy, New York minute, trice, flash, instant