Ping Pong Pixel Matrix Builder

I wanted to make an LED Pixel Matrix using ping pong balls. I started by printing a design by ObsoleteNerd (https://www.thingiverse.com/thing:4609923), which is an exceptionally-clever design if you're doing a smaller Matrix.

However, after printing a couple dozen pixels using ObsoleteNerd's design, it occurred to me that I could build something faster and sturdier if I printed a larger number of pixels connected together in each print.

Instructions:
1) Using the attached SCAD file, specify the number of pixels to print simultaneously. This is done by adjusting the values of the variables "pixelwide" and "pixellen" on rows 2 & 3 of the code.

Note: Each pixel requires 40X40mm of print area, so if you have a 200X200mm printer, you can do a max of 5X5 pixels per print.

Note: You can open the file using the free software OpenSCAD: https://www.openscad.org/downloads.html

2) Render the file and export an STL

3) Slice the STL using your favorite software
Note: No need to