diff --git a/_subsections/sec04/lesson-05.org b/_subsections/sec04/lesson-05.org
index ce4c382..5515363 100644
--- a/_subsections/sec04/lesson-05.org
+++ b/_subsections/sec04/lesson-05.org
@@ -11,3 +11,28 @@
 - we need a collisionshape to tell the physics engine the boundaries of this plane
 - add a child node CollisionShape2D to the CharacterBody2D root node of this scene
 - in the Inspector, click on Shape to determine what type of shape we are using
+
+** create script for falling
+- hit the 'attach new or existing script' button on the upper right corner of the scene dialog
+- make sure that the script:
+  - inherits from CharacterBody2D
+  - the Template is 'Node Default'
+  - Built in Script is OFF
+
+*** script functions
+- ready() starts when node is set
+- process() is called every time a frame is called
+- NOTE: better to use physics_process because that's what the engine is going to use
+  - so change process to physics process
+     #+BEGIN_SRC gdscript
+     _physics_process(delta: float) ->void:
+     #+END_SRC
+
+** CharacterBody2D
+*** properties
+**** velocity
+- has an 'x' and a 'y'
+
+**** up_direction
+- tells physics engine how to know if we are on a floor or not
+- can tell us if we are on a ceiling or a wall