Before you begin, determine the width and location you want for your DIY outdoor bar, since the block units are very heavy to move when finished. Once assembled, paint parts of your bar legs as desired with water-base paint for a finished look. From there, work your way up building the rest of the bar using the diagram. In-between each layer should be concrete glue. When you are done, the top layer should have two concrete blocks on either side. Let sit for the glue to dry.