If you have a good command of painting, draw a line drawing of the zodiac with a pencil and draw it on the back of the paper. Be careful not to break the joint. Cut along the line with scissors or a meat cleaver.
If you can't draw, you can find relevant pictures from the Internet, print them out and copy them on the back of the paper with carbon paper.
The shape should be chubby and look rich and auspicious.