... went to bed already... so it waits for you to return. which means next morning you spend the next 6 hours clicking 'n' every 3 minutes.
my little program sends an 'n' to the keyboard every 5 seconds so you don't have to. it's a bit more elegant than a stapler or a coffe mug or something, and is less likely to come off by accident, or spill stuff over your keyboard when your cat sees it .