From b8e5578ab07dd95dfcc3d8f96d0a4e78cba4c300 Mon Sep 17 00:00:00 2001
From: Grant Sanderson <grantsanderson7@gmail.com>
Date: Thu, 19 Oct 2017 14:32:26 -0700
Subject: [PATCH] Beginning backpropagation animations

---
 nn/part3.py | 103 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 nn/part3.py

diff --git a/nn/part3.py b/nn/part3.py
new file mode 100644
index 00000000..5b683763
--- /dev/null
+++ b/nn/part3.py
@@ -0,0 +1,103 @@
+from nn.network import *
+from nn.part1 import *
+from nn.part2 import *
+
+class LayOutPlan(Scene):
+    def construct(self):
+        title = TextMobject("Plan")
+        title.scale(1.5)
+        title.to_edge(UP)
+        h_line = Line(LEFT, RIGHT).scale(SPACE_WIDTH - 1)
+        h_line.next_to(title, DOWN)
+
+        items = BulletedList(
+            "Recap",
+            "Intuitive walkthrough",
+            "Derivatives in \\\\ computational graphs",
+        )
+        items.to_edge(LEFT, buff = LARGE_BUFF)
+        self.add(items)
+
+        rect = ScreenRectangle()
+        rect.scale_to_fit_width(2*SPACE_WIDTH - items.get_width() - 2)
+        rect.next_to(items, RIGHT, MED_LARGE_BUFF)
+
+        self.play(
+            Write(title),
+            ShowCreation(h_line),
+            ShowCreation(rect),
+            run_time = 2
+        )
+        for i in range(len(items)):
+            self.play(items.fade_all_but, i)
+            self.dither(2)
+
+class TODOInsertFeedForwardAnimations(TODOStub):
+    CONFIG = {
+        "message" : "Insert Feed Forward Animations"
+    }
+
+class TODOInsertStepsDownCostSurface(TODOStub):
+    CONFIG = {
+        "message" : "Insert Steps Down Cost Surface"
+    }
+
+class TODOInsertDefinitionOfCostFunction(TODOStub):
+    CONFIG = {
+        "message" : "Insert Definition of cost function"
+    }
+
+
+class TODOInsertGradientNudging(TODOStub):
+    CONFIG = {
+        "message" : "Insert GradientNudging"
+    }
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+