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Constructing an ellipse before gave the error "name 'width' is not defined" I got this error when running the tutorial at https://github.com/zimmermant/manim_tutorial/blob/master/manim_tutorial_P37.py. python3 -m manim manim_tutorial_P37.py MoreShapes -pl Traceback (most recent call last): File "/Users/jeanwhitmore/Code/python3/manim/manimlib/extract_scene.py", line 153, in main scene = SceneClass(**scene_kwargs) File "/Users/jeanwhitmore/Code/python3/manim/manimlib/scene/scene.py", line 52, in __init__ self.construct() File "manim_tutorial_P37.py", line 33, in construct ellipse=Ellipse(width=3, height=1, color=RED) File "/Users/jeanwhitmore/Code/python3/manim/manimlib/mobject/geometry.py", line 319, in __init__ self.set_width(width, stretch=True) NameError: name 'width' is not defined After this fix, the Ellipse can be constructed and the animation is generated. (Another shape is still broken, and I will try to fix that, too.)