Multiple layers at once display very slowly

Hello all!  I have been trying to figure out how to do this in storyline3 for years and finally got it, but it requires 28 layers, each with a lot of triggers, that need to run all at once.  It works, but it works extremely slooooowly.  So, what I'm doing in this is to randomly create the sentence "Methinks it is like a weasel".  Each letter/space location has a layer.  When the layer starts, a javascript command runs to generate a random number (which appears above each location) and the associated letter or space appears.  The layer repeats until the correct letter is chosen.  The number below each letter is how many repeats are required before the correct letter appears.  These are used to calculate the "Generations".  Currently, when you click on start, it takes a few seconds to get going, then speeds up a little each time a correct letter appears until it's actually cycling at the speed I would like.  I was wondering if anyone knows of any way to make it go faster?  I've attached the file and you can see the activity online here: https://public.biol.ksu.edu/opob/Methinks/story.html . 

Thanks!

Eva