prefers-reduced-motion
prefers-color-scheme
On MacOS, you can enable “reduced motion” in System Preferences:
System Preferences > Accessibility > Display > Display
To switch between light & dark interface mode on MacOS, use System Preferences:
System Preferences > General > Appearance
Visually match the images in the “screenshots” folder and create the interaction shown in the linked video.
Drop this folder into your Markbot application. Make sure to fix all the errors. And submit for grades using Markbot.