I used this for something similar, and is very customisable

https://github.com/matryer/xbar

This isn't quite the same thing, but I have my Mac set up to announce the time every 15 minutes. You can customize the voice, and the voice I'm using causes the computer to sing the time.

All of this is built into the OS, I think the settings are in the control center

If the something you are asking about is scripting/modifying, that something might be Shortcuts (or the older Automator).

If the something you are asking about is a pre-built tool, I would think the menubar is the MacOS place to put a reminder and it looks like someone has built that: https://lifehacker.com/tech/one-thing-app-turns-your-macs-me...

for MacOS bash, do:

` #!/bin/bash

# Set focus text from command line argument or prompt user if [ -z "$1" ]; then echo "What's your current focus?" read FOCUS else FOCUS="$1" fi

if [ -z "$FOCUS" ]; then echo -n "\033]0;$(date +'%b %d %H:%M')\007" else echo -n "\033]0;$(date +'%b %d %H:%M') Focus: $FOCUS\007" fi

echo "Focus set to: $FOCUS" `

for MaxOS zsh, uncomment `DISABLE_AUTO_TITLE="true"` in .zshrc and do:

` #!/bin/zsh

# Set focus text from command line argument or prompt user if [ -z "$1" ]; then echo "What's your current focus?" read FOCUS else FOCUS="$1" fi

if [ -z "$FOCUS" ]; then echo -n "\033]0;$(date +'%b %d %H:%M')\007" else echo -n "\033]0;$(date +'%b %d %H:%M') Focus: $FOCUS\007" fi

echo "Focus set to: $FOCUS" `

Check out swiftbar (see my other comment) https://github.com/swiftbar/SwiftBar

macOS and iOS have a whole feature called Focus modes which allows you to choose a focus and do things based on this focus. Your current focus is shown in the menu bar.

A sticky note stuck to your monitor?