diff --git a/opaque_pointer/application.c b/opaque_pointer/application.c
new file mode 100644
index 0000000..7e191a9
--- /dev/null
+++ b/opaque_pointer/application.c
@@ -0,0 +1,29 @@
+/*
+ * =====================================================================================
+ *
+ *       Filename:  application.c
+ *
+ *    Description:  
+ *
+ *        Version:  1.0
+ *        Created:  10/02/24 10:17:06 PM IST
+ *       Revision:  none
+ *       Compiler:  gcc
+ *
+ *         Author:  YOUR NAME (), 
+ *   Organization:  
+ *
+ * =====================================================================================
+ */
+
+#include "linkedlist.h"
+
+int
+main(){
+    ll_node_t *node1 = malloc_new_node();
+    ll_node_t *node2 = malloc_new_node();
+
+    linkedlist_insertion(node1,node2);
+
+    return 0;
+}
diff --git a/opaque_pointer/linkedlist.c b/opaque_pointer/linkedlist.c
new file mode 100644
index 0000000..55d2658
--- /dev/null
+++ b/opaque_pointer/linkedlist.c
@@ -0,0 +1,48 @@
+/*
+ * =====================================================================================
+ *
+ *       Filename:  linkedlist.c
+ *
+ *    Description:  
+ *
+ *        Version:  1.0
+ *        Created:  10/02/24 08:55:04 PM IST
+ *       Revision:  none
+ *       Compiler:  gcc
+ *
+ *         Author:  YOUR NAME (), 
+ *   Organization:  
+ *
+ * =====================================================================================
+ */
+
+#include "linkedlist.h"
+#include <memory.h>
+#include <stdlib.h>
+
+typedef struct ll_node_{
+    int data;
+    struct ll_node_ *left;
+    struct ll_node_ *right;
+}ll_node_t;
+
+void
+linkedlist_insertion(
+        ll_node_t *current_node,
+        ll_node_t *new_node){
+    
+    if( !current_node ){
+        current_node = new_node;
+        return;
+    }
+
+    current_node->left = new_node;
+    new_node->right = current_node;
+    current_node = new_node;
+    return;
+}
+
+ll_node_t *
+malloc_new_node(){
+    return (ll_node_t *)malloc(sizeof(ll_node_t));
+}
diff --git a/opaque_pointer/linkedlist.h b/opaque_pointer/linkedlist.h
new file mode 100644
index 0000000..4e0b706
--- /dev/null
+++ b/opaque_pointer/linkedlist.h
@@ -0,0 +1,34 @@
+/*
+ * =====================================================================================
+ *
+ *       Filename:  linkedlist.h
+ *
+ *    Description:  
+ *
+ *        Version:  1.0
+ *        Created:  10/02/24 08:40:52 PM IST
+ *       Revision:  none
+ *       Compiler:  gcc
+ *
+ *         Author:  YOUR NAME (), 
+ *   Organization:  
+ *
+ * =====================================================================================
+ */
+
+#ifndef __LINKEDLIST__
+#define __LINKEDLIST__
+
+typedef
+struct ll_node_ ll_node_t;
+
+
+/*public APIs*/
+void
+linkedlist_insertion(
+        ll_node_t *current_node,
+        ll_node_t *new_node);
+
+ll_node_t *
+malloc_new_node();
+#endif