2D Pattern process

For this one, I was trying to use TwnThruCrvs example along with random color and rotating box example (used the shapes to create extrusion) trying to explore interesting forms.. However, as I was working, I realized that the file was getting either too big or complex that it was freezing the computer too often to a point that I would not play around it further patience…. I was wondering if there were some unnecessary commands or maybe a better way to do this…

and here is are the commands that I used…

Also I was trying to open up demo file that I got from one of the students and I got this message…… I was wondering if I would fix this.