It's Lite-Brite for your browser!
Download index.html
and open locally or play here: https://lite-brite-web.netlify.app/
Left click/tap to color a peg. Click again to change color.
Right click or double tap to clear a peg.
You may also click/tap and drag to color or clear multiple pegs at a time.
Click on clear board to erase the entire board and start over.