My current terminal emulator is Alacritty. One thing I would like is a way to change the colours while the terminal is running. The only way to do so is the edit the configuration file, but doing so by hand can be annoying. There are some scripts out there that let you do it automatically, but all that I have found rely on bloated stuff like having Node.js installed. We can do better by using just what we already have on Unix out of the box.