The Munching Square is a display hack dating back to the PDP-1 (ca. 1962, reportedly discovered by Jackson Wright), which employs a trivial computation (repeatedly plotting the graph Y = X XOR T for successive values of T) to produce an impressive display of moving and growing squares that devour the screen.
Madison Square Garden | Times Square | Tiananmen Square protests of 1989 | Trafalgar Square | Square | Leicester Square | Tiananmen Square | Red Square | A Nightingale Sang in Berkeley Square (song) | A Nightingale Sang in Berkeley Square | Square Enix | Soho Square | Rittenhouse Square | Union Square | Harvard Square | Tompkins Square Park | Thompson Square | Root mean square | Washington Square Park | Syntagma Square | Square (company) | Russell Square | Merrion Square | Independence Square | Hanover Square, London | Fitzroy Square | Cathedral Square | Taksim Square | square | Market Square Arena |