For the "green" prompt, I looked around my yard and created a nature mask made of various plant life I found. You can see a quick view of my process and the final results on my character here. :)
This was created for Scratchtober! Learn more here: https://scratch.mit.edu/studios/34024756 REMIX IDEA: Remix and show me your own nature mask or nature outfit. You can draw elements in the paint editor or gather and take pictures. :)