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Marquee like animation for very long paragraph

OS: Windows 7
PsychoPy version: 3.2.3
Standard Standalone? (y/n): y

I am trying to create HTML marquee like text animation using TextSim as mentioned in the animation tutorial. Unlike the tutorial, the text that I am trying to animate is a very long sentence of a moral dilemma. I have to present approximately 16 letters per second and size should be 32pt. For the text to be contained in a single line, I use word wrap. The animation is from RTL and first letter should appear as the routine begins.

I am facing two main problems.

  • It is very hard to limit the number of letters to 16/sec.
  • With word wrap, it is hard to control the beginning of animation especially as different dilemmas have different width.

Is there a better way to do the same? I was thinking about animating individual letters, but not sure whether some other hidden costs would hinder that.
Will any other component other than TextSim be of any help in this context?