We came up with this for a project a while ago, and thought it might be useful if you use After Effects. It divides the screen up into 7 frames, into which you can put video, stills or whatever you want, and it works out where everything should go so that you don’t get any gaps.
Feel free to use it anywhere you like – if you use it in a commercial project, we’d appreciate a link!
Here’s a brief tutorial on the project file…
Download the file: NoMagnolia_Mondrian.aep (ZIP file, CC 2018 v15.1.1 format).