I just started coloring a pic I drew of Seraph's knife, and then decided to add her paw clutching the hilt and later her eyes staring at you from the black background. Afterwards, I added Doxisite's eyes glaring down at her like he was sneaking up behind her. Lastly, I added the title to the full pic and then cropped part of the image for a banner. It wasn't anything fancy, though.