In small sauce pan melt margarine/butter over low heat. When melted, add graham cracker crumbs and stir until crumbs are all coated. Put crumbs in a 9x13 dish and press down to cover the entire bottom of the dish. Next, make your layers spread chocolate chips,pour a small amount of the sweetened condensed milk between layers then butterscoth chips, more condensed mils, then sprinkle coconut, more condensed milk, and then top with nuts. Place in pre-heated oven @325 degrees and bake for 20-25 minutes. Let cool completely. Then cut in bars. If any are left they do well in refrigerator! Enjoy!