There’s this super cool gallery of effect by @Keyserito https://www.deviantart.com/jasonkeyser/gallery/ in which you can find some of his work on looping fire, it might help you:
He also has this dope youtube playlist where he explains how to create this kind of effects with Adobe Flash (now called Adobe Animate if I’m not mistaken): https://www.youtube.com/playlist?list=PLQD_sA-R5qVLOZ2EIi4zqsD3WSnF4QwIy