I found in manim there are two kinds of way to display animation, one way is to useself.play()and by adding run_time = Xin kwargs, the speed of animation can be set and the animation will finish in X seconds.
But I found another way to display by first adding an object with updater using self.add() and wait it to display using self.wait().
How to control the speed if use self.add() and self.wait()?
There is a demo to show the case
BTW, I'm using manimgl instead of community version in order to achieve real time rendering.
