I searched the web for pictures that only had red or green as the major colors. I found nine of them and changed all of their sizes to 1 inch squares. I mounted them on a slightly bigger square of black. I cut one red and one green square and then cut those squares in diagonal quarters. I arranged two red and two green triangles into a square and glued it to the black card base. Lastly I arranged and glued down all the pictures. This is not exactly a serendipity design but close.