FBI Warning
Okay, here is an obscure question.
I no longer have an Apple II, unfortunatly, but I have a nagging memory - or you may call it an obsession over a memory. When I was in 6th grade (I'm 23 now), I was bored and was sitting at the computer and began turning the power switch on and off. After a few times the screen displayed code. It wasn't programming code as far as I know, but code none the less. After displaying a line of code, the computer had an input line with the blinking promt cursor. After playing around with it by pressing random characters I got it to display more code (for some reason I remember pressing the letter "B" alot - backed up with diffrent random numbers like "B12" or "B23"). Then, after serval hours, days, and weeks of playing with this mysterious code, the screen cleared and then displayed in the middle of the screen "IOU". I stared at it for a while and pressed the "Return" key (I think "Return" is the right name - Ha! -it's been too long). The code looked the same. I think after that and I just continued the same as I did before(pressing random characters) - a few hours after this though the font reduced in size and instead of lines of code, it was diplayed in blocks of code. Very soon after this, the screen cleared and dsplayed "FBI Warning". But it did not simply say FBI Warning. It scrolled by itself and the "FBI Warning" was created by first writing FBI with the letters "FBI" several times to make the effect of very large font ("Warning" was done in the same way").
Something like that.
I would appreciate it if someone could let me know if they know what this is. It kind of got me into computer programming. This was actually the main reason I started going to school for it, because this made me mystified by code.

