So an art canvas is basically a frame with some cloth on it hardened by glue.
So for making glue you need rabbit skin. The recipe could be: put a rabbit fur on a flat rock. use a knife on the fur to get rid of the hairs. now you have rabbit skin. use the knife for cutting small pieces of skin. now use a bowl on the skin. add water to the bowl. heat it up on fire. now you have glue. use the glue on the cloth on the frame. now you have a canvas.
now add any color to the canvas and you will get some art. with each color you get a different image. you can hang the frame on a wall.