diff --git a/big_ol_pile_of_manim_imports.py b/big_ol_pile_of_manim_imports.py
index 88420935..af2f7be6 100644
--- a/big_ol_pile_of_manim_imports.py
+++ b/big_ol_pile_of_manim_imports.py
@@ -35,23 +35,24 @@ from continual_animation.from_animation import *
 from continual_animation.numbers import *
 from continual_animation.update import *
 
-from mobject.mobject import *
 from mobject.frame import *
 from mobject.geometry import *
+from mobject.mobject import *
+from mobject.number_line import *
 from mobject.numbers import *
 from mobject.shape_matchers import *
-from mobject.value_tracker import *
 from mobject.svg.brace import *
 from mobject.svg.svg_mobject import *
 from mobject.svg.tex_mobject import *
 from mobject.types.image_mobject import *
 from mobject.types.point_cloud_mobject import *
 from mobject.types.vectorized_mobject import *
+from mobject.value_tracker import *
 
+from for_3b1b_videos.common_scenes import *
 from for_3b1b_videos.pi_creature import *
 from for_3b1b_videos.pi_creature_animations import *
 from for_3b1b_videos.pi_creature_scene import *
-from for_3b1b_videos.common_scenes import *
 
 from scene.moving_camera_scene import *
 from scene.reconfigurable_scene import *
@@ -70,7 +71,6 @@ from once_useful_constructs.light import *
 from topics.functions import *
 from topics.graph_scene import *
 from topics.matrix import *
-from topics.number_line import *
 from topics.probability import *
 from topics.three_dimensions import *
 from topics.vector_space_scene import *
@@ -101,4 +101,3 @@ import sys
 
 from PIL import Image
 from colour import Color
-
diff --git a/mobject/coordinate_systems.py b/mobject/coordinate_systems.py
index 0b92a04c..9a634ef8 100644
--- a/mobject/coordinate_systems.py
+++ b/mobject/coordinate_systems.py
@@ -6,14 +6,14 @@ from constants import *
 
 from mobject.geometry import Arrow
 from mobject.geometry import Line
+from mobject.number_line import NumberLine
 from mobject.svg.tex_mobject import TexMobject
 from mobject.types.vectorized_mobject import VGroup
 from mobject.types.vectorized_mobject import VMobject
 from topics.functions import ParametricFunction
-from topics.number_line import NumberLine
 from utils.config_ops import digest_config
-from utils.space_ops import angle_of_vector
 from utils.space_ops import R3_to_complex
+from utils.space_ops import angle_of_vector
 from utils.space_ops import complex_to_R3
 
 #TODO: There should be much more code reuse between Axes, NumberPlane and GraphScene
diff --git a/topics/number_line.py b/mobject/number_line.py
similarity index 99%
rename from topics/number_line.py
rename to mobject/number_line.py
index fc47d440..5022df21 100644
--- a/topics/number_line.py
+++ b/mobject/number_line.py
@@ -150,12 +150,3 @@ class UnitInterval(NumberLine):
         "number_at_center" : 0.5,
     }
 
-
-
-
-
-
-
-
-
-
diff --git a/topics/graph_scene.py b/topics/graph_scene.py
index 7dbe5eca..403e96b6 100644
--- a/topics/graph_scene.py
+++ b/topics/graph_scene.py
@@ -3,18 +3,18 @@ from constants import *
 from scene.scene import Scene
 # from mobject.geometry import 
 from animation.creation import ShowCreation
-from animation.update import UpdateFromAlphaFunc
 from animation.creation import Write
 from animation.transform import Transform
+from animation.update import UpdateFromAlphaFunc
+from mobject.geometry import DashedLine
+from mobject.geometry import Line
+from mobject.geometry import Rectangle
+from mobject.number_line import NumberLine
 from mobject.svg.tex_mobject import TexMobject
 from mobject.svg.tex_mobject import TextMobject
 from mobject.types.vectorized_mobject import VGroup
 from mobject.types.vectorized_mobject import VectorizedPoint
 from topics.functions import ParametricFunction
-from mobject.geometry import DashedLine
-from mobject.geometry import Line
-from mobject.geometry import Rectangle
-from topics.number_line import NumberLine
 from utils.bezier import interpolate
 from utils.color import color_gradient
 from utils.color import invert_color