Very curious!

Step 1: Log into Facebook

Step 2: press the following key sequence (one at a time):

up arrow, up arrow, down arrow down arrow, left arrow, right arrow, left arrow, right arrow, b, a, <Enter>

Step 3:

In Windows, right click on the screen to open the options window, then click away from the options window to close it

In OSX, control click on the screen to open the options window, then click away from the options window to close it

Step 4: Now when you press up or down arrow, or click the pointer a set of coloured circles will appear on the screen – weird.

Step 5: Simply log out of Facebook to cancel this effect.

Thanks to my daughter for sharing this strange find with me. You never know what you will learn.

~ Mark