diff --git a/linked_lists/intersection.py b/linked_lists/intersection.py
index f07e2ae..952b2f4 100644
--- a/linked_lists/intersection.py
+++ b/linked_lists/intersection.py
@@ -11,4 +11,24 @@ def intersection_node(headA, headB):
     """ Will return the node at which the two lists intersect.
         If the two linked lists have no intersection at all, return None.
     """
-    pass
\ No newline at end of file
+
+    #linked_list_a: 3 -> 4 -> 5 -> 6 -> 7
+    # linked_list_b: 1 -> 2 -> 5 -> 6 -> 7
+    
+    if not headA or not headB: 
+        return None
+    
+    current_a = headA
+    current_b = headB
+
+    while current_b:
+        while current_a: 
+            if current_a == current_b:
+                return current_a
+            current_a = current_a.next
+            
+        current_a = headA
+        current_b = current_b.next
+
+    return None
+            
\ No newline at end of file