You could use this guide, and use the proportions but just replace the barriers with overall darker tiles. You can also use the text box to copy and paste a square in to use that to do pixel art and animate it
Heres the guide for the Dragon Art:
And heres one for animation if you want:
Another idea getting fire to spew out from toothless by using orange and red squares. I didn’t really see toothless breathe fire when watching how to train your dragon, but it might be cool to add