diff --git a/cv4/list_ops.c b/cv4/list_ops.c
index e69de29..6b58f78 100644
--- a/cv4/list_ops.c
+++ b/cv4/list_ops.c
@@ -0,0 +1,53 @@
+#ifndef LIST_OPS_H
+#define LIST_OPS_H
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+list_t *new_list(size_t length, list_element_t elements[]){
+  char* list = (char*)malloc(length);
+  return NULL;
+}
+
+list_t *append_list(list_t *list1, list_t *list2){
+  return NULL;
+
+}
+
+list_t *filter_list(list_t *list, bool (*filter)(list_element_t)){
+  return NULL;
+
+}
+
+size_t length_list(list_t *list){
+  return 0;
+
+}
+
+list_t *map_list(list_t *list, list_element_t (*map)(list_element_t)){
+  return NULL;
+
+}
+
+list_element_t foldl_list(list_t *list, list_element_t initial,list_element_t (*foldl)(list_element_t,list_element_t)){
+  list_element_t res=0;
+  return res;
+
+}
+
+list_element_t foldr_list(list_t *list, list_element_t initial,list_element_t (*foldr)(list_element_t,list_element_t)){
+  list_element_t res=0;
+  return res;
+
+}
+
+list_t *reverse_list(list_t *list){
+  return NULL;
+
+}
+
+void delete_list(list_t *list){
+
+} 
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