A guide exists, but due to Scratch blocking links, it is unavailable. Post your e-mail account in the comments, and I'll send it to you through there. This is version 0.7.0 build 1827.
ABOUT: One of my very first Scratch projects from 2014 had a similar premise to this, although much simpler. In 2021 I had the idea to make it again. Here it is! Over ten years in the making, and I'm finally putting it out. This is merely a hobby of mine, but I'd really appreciate it if you checked it out. INFO: All parts of this project were referenced from photos and videos I've taken during my time riding these cars. The sign was modeled in Blender, and each route and destination were rendered individually to save space. Adobe Photoshop was used to make the signs for earlier versions (0.5.0 to 0.6.0.726) CREDITS: -Voice announcements courtesy of the SFMTA, obtained using the Freedom of Information Act. -SFSubway font (used in renderings) "Sprite text engine" by @cartercypherout3 https://scratch.mit.edu/projects/670465480/