L.E.D.

When computers were still new technologies, a menace appeared, in form of a digital sickness called "virus". A company created a product that was about to change computing forever : "MEDITECKS" was its name, and "Luminous Electronic Doctor" was the product. It was a small device that you could control from your computer that went inside of the machine, so that you could find the virus and destroy it. 

Unfortunately, these products only understood binary language, the user had to communicate in binary to its L.E.D. for it to be used. You could only press one button to make your L.E.D. move...

You should try and explore the inside of your computer, who knows what you wil find there...