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If you mean a physical light, you can buy light switches and coloured bulbs from a hardware store.

there's also a dude on amazon who sells lightbulbs with unlocked bootloaders, if you dont want to have 2 lightbulbs.

> This is the perfect platform for stuff like this.

What's perfect about this platform for it?

These are readily available. I visited a place once where they had one of these in every cubicle, and it was synced with whatever your current status on Lync (nowadays called MS Teams) was.

Note that most of the staff absolutely hated it.

turns out consent, agency and autonomy are important!

to be clear, I suggested this for me to help me.

I'm just saying you could probably find one of those devices. It sounded great in theory, but actually doing it, well, it's just plain awkward to come to someone's cubicle and there's a yellow light. It's not red, but it's not green. What do you do next?

For extra fun times, the owner of the company tended to just ignore everyone else's red and yellow lights, and he kept working in an office with a door that he closed.