So I got two small rectangular canvases left, after I stretch my canvas in a very first time in my life. And I looked at them, wondering what can I do with those pieces. Somehow the texture of the canvases, just remind me of cave paintings, then I decided to do a painting about how will people do cave paintings in the future. I sew the canvases together, because it came to my mind that the canvases are fabric, and people usually use needle to sew fabric if they want the fabric to be together. Also I use oil bar to create a crayon-like drawing, to keep it simple.
And this is my result.