A little Programm, that spinn your mouse coursor. The Arduino version is for this USB-Stick.
To stop the Java version, just move your mouse to the top left corner and then down to the bottom right within 5 seconds (should work for multi-screen-setup, but no warranty.) To stop the Arduino version just unplug the device or constantly reset the processor of the device (not the computer!!!).
I take no warranty for anything!