Shader doesn't work on 1.20.5

This shader takes a font object with markers on the edges at 251 transparency, the markers are lined up on the player's camera. And also, depending on the blue color (#100000 "switch"), an animation will be played. The animation depends on the transparency of the font (title times start time and end time).
Help me to port to 1.20.5 from 1.20.4, because I can't do it :/