Added file for the GUI system.

ui.py

@@ -0,0 +1,14 @@
+#!/usr/bin/python3
+
+class UI:
+    def __init__(self):
+        self.current_page = "main_menu"
+
+        self.main_menu = Page()
+
+
+class Page:
+    def __init__(self, elements: dict=None):
+        if not elements is None:
+            for name, element in elements.items():
+                setattr(self, name, element)