You can make a zentangle by first taking a plain paper and drawing a border to outline the shape of your zentangle. You should then draw lines that show the different sections of your zentangle. After that, you need to fill the sections with different repetitive pattern. You can also add color or shading to your zentangle. You can also go to http://www.ehow.com/how_8205434_make-cool-easy-doodles.html for reference.