Melt 1 stick butter in a jelly roll pan. Spread in pan (in layers) - 1 cup of graham cracker crumbs, 1 cup of shredded coconut, 6 oz of butterscotch chips and 6 oz. of chocolate chips. Drizzle one can of sweet condensed milk on top. Add 1 cup of chopped walnuts on top. Bake at 350 degress for 30 minutes. Remove and let cool - then cut into squares.