Animation And Timeline

play() And animate

play() runs an animation. The animate interface is the concise way to turn object method chains into timeline motion.

square = Square().set_fill(RED, opacity=1.0)self.add(square)self.play(square.animate.set_fill(WHITE), run_time=1)self.play(square.animate.shift(UP).rotate(PI / 3), run_time=1.5) 

Transforms

• Transform morphs one object into another while continuing to animate the source variable.
• ReplacementTransform is the right tool when the target object should take over afterward.
• TransformFromCopy is useful when the original object should remain visible.

Indication Animations

Use indication effects such as Indicate, Circumscribe, Flash, andApplyWave when you want emphasis without changing the underlying scene structure.

Trackers And Updaters

ValueTracker and always_redraw() are the core tools for reactive scenes, animated counters, graphs, and parameterized motion systems.

tracker = ValueTracker(0) dot = always_redraw(    lambda: Dot(color=YELLOW).move_to(RIGHT * tracker.get_value())) self.add(dot)self.play(tracker.animate.set_value(3), run_time=1.5)