This pattern is easily adjusted, and errors tend to be fairly easy to pick up on and correct. The amount and type of MC yarn is approximated, as it comes from an unlabeled, reclaimed skein that resembles Red Heart spun together with a thin, shiny fibre of some sort. I wrote the pattern out as I was knitting on a very tight schedule, so please let me know if there are errors.

Clarification added 19 Feb: There is no carrying yarn across other-colour sections. The horizontal white sections are done with the same yarn strand all the way across. The white columns between the blocks are each their own small bobbin, tied off when they meet the next horizontal section.