Each letter is moved by one animation loop with the formulas of BounceText, FadeInText, ScareText and
GlitchText (fi follows the text speed, bt keeps its phase while a line is typed out, glitch cuts the text
into strips that jump sideways). Flatten and `at Flatten` isolate their children as one picture, screens
get the 3D turns, matrixtransform and blend of their widgets, and RotateMatrix/OffsetMatrix/ScaleMatrix
exist in Python.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
