Exactly! though I used xclock. A former co-worker used to always have xeyes open on his desktop to easily find his cursor. Maybe I'm getting old...

xeyes is also a great way to tell if you're in a Wayland session. If it tracks your mouse always, it's X. If it only tracks in its own window, it's Wayland.

Glad to know I’m not the only one! That and glxgears.

I use xlogo for that and similar purposes; it’s even more minimalistic in its functionality than xeyes.

Ha! Yes! I used to call xeyes a network testing tool.

When my kids were infants, they loved xeyes.

launch an xterm, smh, kids ^^) /s