--- a
+++ b/modules/IndexedDB/DLL.py
@@ -0,0 +1,68 @@
+#Doubly linked list
+"""
+    ** The Testing fold is always at the head of the list
+
+    ** Create a node: new_node = Node(data)
+    ** Retrieve data from node: new_node.get_data()
+    ** Get previous node in list: previous = new_node.get_pre()
+    ** Get next node in list: next = new_node.get_next()
+    ** Set previous node: new_node.set_pre(prevNode)
+    ** Set next node: new_node.set_next(nextNode)
+"""
+import sys
+sys.dont_write_bytecode = True
+
+class _Node(object):
+	def __init__(self, data=None, pre_node=None, next_node=None):
+		self.data = data
+		self.pre_node = pre_node
+		self.next_node = next_node
+
+	def get_data(self):
+		return self.data
+
+	def get_pre(self):
+		return self.pre_node
+
+	def get_next(self):
+		return self.next_node
+
+	def set_pre(self, new_pre):
+		self.pre_node = new_pre
+
+	def set_next(self, new_next):
+		self.next_node = new_next
+
+"""
+    ** Create a DLL: List = DLL()
+    ** Append a new node to list: List.append(data)
+    ** Update list:
+        This functions will move the head (which holds the current Testing data)
+        to the end of the list making a new fold of data the new Testing data
+"""
+class _DLL(object):
+    def __init__(self, head=None, tail=None):
+        self.head = head
+        self.tail = tail
+
+    def append(self, data):
+        new_node = _Node(data)
+        if self.head is None:
+            self.head = self.tail = new_node
+        else:
+            new_node.set_pre(self.tail)
+            new_node.set_next(None)
+            self.tail.set_next(new_node)
+            self.tail = new_node
+
+    def printList(self):
+        current = self.head
+        while current is not None:
+            print current.get_data()
+            current = current.get_next()
+
+    def updateList(self):
+        current_testing = self.head
+        self.head = self.head.get_next()
+        self.tail.set_next(current_testing)
+        self.tail = current_testing