Simon uses graphic repetition to highlight an aspect of a typeface. He likes the idea a lot. Repetition is beautiful because it draws attention to pattern, scale, and other things by appealing to my love of multiples. I suspect, for Simon, that repetition is a bit self-referential since his computational medium so overtly boasts its ability to create perfect copies. Simon takes this a step further to illustrate ideas other than multiplicity. In the case of the bitmapped font, he uses the nature of the font to define its layout, and thus amplify its pixel roots. In the case of the train, he evokes time-lapse or animation, creating scale, movement and pictorial composition with simple repetition of the letters that spell out his subject.