How to Make Colorful and fun paper plate dragons! Adjust the paper and the glass until a rainbow forms on the paper. Notice the shape and colors. If you are using sunlight, place the glass so that it is half on and half off the edge of a table, and so that the sun shines directly through the water, onto a sheet of white paper on the floor. You will see a rainbow inside! Your email address will not be published. A lesson with ArtDaniela. Advanced Glass o’ Water Approach: You will need: A glass of water. The difference that CD makes for the images is stunning and every image will show different colours and gradients. //