Google notebook :
https://colab.research.google.com/github/ddPn08/stable-diffusion-webui-colab/blob/main/automatic1111.ipynb#scrollTo=A6OFCY
The notebook is running a version of the following github repo :
https://github.com/AUTOMATIC1111/stable-diffusion-webui
GlueIT for mosaic / spritesheets:
https://github.com/Kavex/GlueIT
https://github.com/Kavex/GlueIT
Download Stable Diffusion 1.5, since 2.0 and 2.1 (even for 512x512 or 768x768) sucks when not working with photorealistic outputs (and lost almost every artist artsyle):
https://huggingface.co/runwayml/stable-diffusion-v1-5