-# test.out: $(UTILS) lambda3.cmx test1.ml
-# $(OCAMLC) -o test.out $(LIB) $^
-#
-test4.out: $(UTILS) lambda4.cmx test.ml
- $(OCAMLC) -o test4.out $(LIB) $^
+lambda4.out: $(UTILS) lambda4.cmx
+ $(OCAMLC) -o lambda4.out $(LIB) $^
+
+lambda4_test.out: $(UTILS) lambda4.cmx test.ml
+ $(OCAMLC) -o lambda4_test.out $(LIB) $^
+
+simple.out: $(UTILS) simple.cmx
+ $(OCAMLC) -o simple.out $(LIB) $^
+
+simple_test.out: $(UTILS) simple.cmx simple_test.ml
+ $(OCAMLC) -o simple_test.out $(LIB) $^