Mousey is a tiny background process that nudges your mouse cursor periodically, (once each minute by default). To change the interval, pass an integer argument on the command line to specify the number of minutes.
Mousey alternates the direction that it nudges the mouse cursor so that it will not wander off the screen over time. When Mousey is running you will see the orange traffic cone in the system tray, -- see, it's "reserving" your screen:
Right-click to exit or pause execution.
|The script:||mousey.ahk (requires AutoHotkey to run)|