diff --git a/youngjin.han/learning-node02-2020.org b/youngjin.han/learning-node02-2020.org
index 3c26201..a30e0fc 100644
--- a/youngjin.han/learning-node02-2020.org
+++ b/youngjin.han/learning-node02-2020.org
@@ -1,3 +1,11 @@
+* 2020-06-15
+*** DONE Python #10:
+    CLOSED: [2020-06-15 월 23:55]
+**** Lecture content
+     - Same structure as "Python #2"
+     - Exercise 43
+**** Lecture material
+     - Available on https://cloud.ungleich.ch/s/435FyfrQyEq6oF3
 * 2020-06-12
 *** Python #9:
 **** DONE Lecture content
diff --git a/youngjin.han/python-the-hard-way/ex43.py b/youngjin.han/python-the-hard-way/ex43.py
new file mode 100644
index 0000000..798a9f3
--- /dev/null
+++ b/youngjin.han/python-the-hard-way/ex43.py
@@ -0,0 +1,266 @@
+from sys import exit
+from random import randint
+from textwrap import dedent
+
+class Scene(object):
+
+    def enter(self):
+        print("This scene is not yet configured.")
+        print("Subclass it and implement enter().")
+        exit(1)
+
+class Engine(object):
+
+    def __init__(self, scene_map):
+        self.scene_map = scene_map
+
+    def play(self):
+        current_scene = self.scene_map.opening_scene()
+        last_scene = self.scene_map.next_scene('finished')
+
+        while current_scene != last_scene:
+            next_scene_name = current_scene.enter()
+            current_scene = self.scene_map.next_scene(next_scene_name)
+
+        # be sure to print out the last scene
+        current_scene.enter()
+        
+class Death(Scene):
+
+    quips = [
+        "You died. You kinda suck at this.",
+        "Your Mom would be proud...if she were smarter.",
+        "Such a luser.",
+        "I have a small puppy that's better at this.",
+        "You're worse than your Dad's jokes."
+
+        ]
+    
+    def enter(self):
+        print(Death.quips[randint(0, len(self.quips)-1)])
+        exit(1)
+
+class CentralCorridor(Scene):
+
+    def enter(self):
+        print(dedent("""
+            The Gothons of Planet Percal #25 have invaded your ship and
+            destroyed your entire crew. You are the last surviving
+            member and your last mission is to get the neutron destruct
+            bomb from the Weapons Armory, put it in the bridge, and
+            blow the ship up after getting into an escape pod.
+
+            You're running down the central corridor to the Weapons
+            Armory when a Gothon jumps out, red scaly skin, dark grimy
+            teeth, and evil clown costume flowing around his hate
+            filled body. He's blocking the door to the Armory and
+            about to pull a weapon to blast you.
+            """))
+
+        action = input("> ")
+
+        if action == "shoot!":
+            print(dedent("""
+                Quick on the draw you yank out your blaster and fire
+                it at the Gothon. His clown costume is flowing and
+                moving around his body, which throws off your aim.
+                Your laser hits his costume but misses him entirely.
+                This completely ruins his brand new costume his mother
+                bought him, which makes him fly into an insane rage
+                and blast you repeatedly in the face until you are
+                dead. Then he eats you.
+                """))
+            return 'death'
+
+        elif action == "dodge!":
+            print(dedent("""
+                Like a world class boxer you dodge, weave, slip and
+                slide right as the Gothon's blaster cranks a laser
+                past your head. In the middle of your artful dodge
+                your foot slips and you bang your head on the metal
+                wall and pass out. You wake up shortly after only to
+                die as the Gothon stomps on your head and eats you.
+                """))
+            return 'death'
+
+        elif action == "tell a joke" or int(action) == 0:
+            print(dedent("""
+                Lucky for you they made you learn Gothon insults in
+                the academy. You tell the one Gothon joke you know:
+                Lbhe zbgure vf fb sng, jura fur fvgf nebhaq gur ubhfr,
+                fur fvgf nebhaq gur ubhfr. The Gothon stops, tries
+                not to laugh, then busts out laughing and can't move.
+                While he's laughing you run up and shoot him square in
+                the head putting him down, then jump through the
+                Weapon Armory door.
+                """))
+            return 'laser_weapon_armory'
+
+        else:
+            print("DOES NOT COMPUTE!")
+            return 'central_corridor'
+    
+class LaserWeaponArmory(Scene):
+
+    def enter(self):
+        print(dedent("""
+            You do a dive roll into the Weapon Armory, crouch and scan
+            the room for more Gothons that might be hiding. It's dead
+            quiet, too quiet. You stand up and run to the far side of
+            the room and find the neutron bomb in its container.
+            There's a keypad lock on the box and you need the code to
+            get the bomb out. If you get the code wrong 10 times then
+            the lock closes forever and you can't get the bomb. The
+            code is 3 digits.
+            """))
+
+        code = f"{randint(1,9)}{randint(1,9)}{randint(1,9)}"
+        guess = input("[keypad]> ")
+        guesses = 0
+
+        while guess != code and guesses < 9:
+            print("BZZZZEDDD!")
+            guesses += 1
+            guess = input("[keypad]> ")
+
+        if guess == code or int(guess) == 0:
+            print(dedent("""
+                The container clicks open and the seal breaks, letting
+                gas out. You grab the neutron bomb and run as fast as
+                you can to the bridge where you must place it in the
+                right spot.
+                """))
+            return 'the_bridge'
+        else:
+            print(dedent("""
+                The lock buzzes one last time and then you hear a
+                sickening melting sound as the mechanism is fused
+                together. You decide to sit there, and finally the
+                Gothons blow up the ship from their ship and you die.
+                """))
+            return 'death'
+
+
+
+class TheBridge(Scene):
+
+    def enter(self):
+        print(dedent("""
+            You burst onto the Bridge with the netron destruct bomb
+            under your arm and surprise 5 Gothons who are trying to
+            take control of the ship. Each of them has an even uglier
+            clown costume than the last. They haven't pulled their
+            weapons out yet, as they see the active bomb under your
+            arm and don't want to set it off.
+            """))
+
+        action = input("> ")
+
+        if action == "throw the bomb":
+            print(dedent("""
+                In a panic you throw the bomb at the group of Gothons
+                and make a leap for the door. Right as you drop it a
+                Gothon shoots you right in the back killing you. As
+                you die you see another Gothon frantically try to
+                disarm the bomb. You die knowing they will probably
+                blow up when it goes off.
+                """))
+            return 'death'
+
+        elif action == "slowly place the bomb" or int(action) == 0:
+            print(dedent("""
+                You point your blaster at the bomb under your arm and
+                the Gothons put their hands up and start to sweat.
+                You inch backward to the door, open it, and then
+                carefully place the bomb on the floor, pointing your
+                blaster at it. You then jump back through the door,
+                punch the close button and blast the lock so the
+                Gothons can't get out. Now that the bomb is placed
+                you run to the escape pod to get off this tin can.
+                """))
+
+            return 'escape_pod'
+        else:
+            print("DOES NOT COMPUTE!")
+            return "the_bridge"
+
+
+class EscapePod(Scene):
+
+    def enter(self):
+        print(dedent("""
+            You rush through the ship desperately trying to make it to
+            the escape pod before the whole ship explodes. It seems
+            like hardly any Gothons are on the ship, so your run is
+            clear of interference. You get to the chamber with the
+            escape pods, and now need to pick one to take. Some of
+            them could be damaged but you don't have time to look.
+            There's 5 pods, which one do you take?
+            """))
+
+        good_pod = randint(1,5)
+        guess = input("[pod #]> ")
+
+
+        if int(guess) != good_pod:
+            print(dedent(f"""
+                You jump into pod {guess} and hit the eject button.
+                The pod escapes out into the void of space, then
+                implodes as the hull ruptures, crushing your body into
+                jam jelly.
+                """))
+            return 'death'
+        elif int(guess) == 0:
+            print(dedent(f"""
+                You jump into pod {guess} and hit the eject button.
+                The pod easily slides out into space heading to the
+                planet below. As it flies to the planet, you look
+                back and see your ship implode then explode like a
+                bright star, taking out the Gothon ship at the same
+                time. You won!
+                """))
+
+            return 'finished'
+            
+        else:
+            print(dedent(f"""
+                You jump into pod {guess} and hit the eject button.
+                The pod easily slides out into space heading to the
+                planet below. As it flies to the planet, you look
+                back and see your ship implode then explode like a
+                bright star, taking out the Gothon ship at the same
+                time. You won!
+                """))
+
+            return 'finished'
+
+class Finished(Scene):
+
+    def enter(self):
+        print("You won! Good job.")
+        return 'finished'
+
+class Map(object):
+
+    scenes = {
+        'central_corridor': CentralCorridor(),
+        'laser_weapon_armory': LaserWeaponArmory(),
+        'the_bridge': TheBridge(),
+        'escape_pod': EscapePod(),
+        'death': Death(),
+        'finished': Finished(),
+    }
+
+    def __init__(self, start_scene):
+        self.start_scene = start_scene
+
+    def next_scene(self, scene_name):
+        val = Map.scenes.get(scene_name)
+        return val
+
+    def opening_scene(self):
+        return self.next_scene(self.start_scene)
+
+a_map = Map('central_corridor')
+a_game = Engine(a_map)
+a_game.play()
diff --git a/youngjin.han/python.org b/youngjin.han/python.org
index 2b24ffb..b60fe35 100644
--- a/youngjin.han/python.org
+++ b/youngjin.han/python.org
@@ -1,4 +1,9 @@
+* 2020-06-15
+** note
+  - ex43.py
+    - none
 * 2020-06-12
+** note
   - ex42.py
     - MRO(method resolution order)
 * 2020-06-10