required to do is go for a shadow frame from a local market. once you have this, it is required that you have some poster board and a piece of cloth. it is important to note that one should then cut the piece of cloth almost the same as the cardboard in size. allow for some space at the edges, at least one half or one inch.
put the poster card into the middle of the fabric and then take glue and run it around the edges of the cardboard. pull the excess material and fix it at the back of the cardboard. it is required that you make sure there 