So, let's say you are using Quest from Textadventures.co.uk and you want to add an animation, but you don't want to add a YouTube video.

Instead, you want it to be embedded in the code, and you also don't want it to loop like a GIF.

Go to EZgif.com and navigate to the APNG creator (which generates Animated PNG files) or the GIF creator.

Then create a GIF, go to the loop section, and type in "1".

Typing in "1" will make the animation play once.

If you were to type in "5", it would loop five times and then stop forever.

Typing "0" makes it loop forever.