Melt the chocolates in three separate bowls according to package directions. Put spoonfuls of yellow chocolate at different spots over the wax paper. Repeat with the orange chocolate and the white chocolate. Gently swirl the chocolates together with the back of a spoon to make one large piece of chocolate (you will end up about two inches from the outside edge of the pan.
Working quickly before the chocolate hardens, place the candy corn and then the M&Ms in the chocolate. Allow to harden completely in the refrigerator and then break apart.