General changes, got basic visualization of an activation function working for a

convolutinoal layer.

tests/test_succession.py

@@ -0,0 +1,19 @@
+from manim import *
+
+class TestSuccession(Scene):
+
+    def construct(self):
+        white_dot = Dot(color=WHITE)
+        white_dot.shift(UP)
+
+        red_dot = Dot(color=RED)
+
+        self.play(
+            Succession(
+                Create(white_dot),
+                white_dot.animate.shift(RIGHT),
+                Create(red_dot),
+                Wait(1),
+                Uncreate(red_dot),
+            )
+        )