Graphics Surprises

When we combine the uncertainty of the ZX80’s randomizing feature with its graphics capacities, we have the ingredients for a lot of fun. For example, the Crazy Quilt program uses only two instructions, yet it fills the screen with a zany tangle of symbols and spots. A more challenging application of graphics and randomizing is found in “Walls and Dikes.” This program generates a maze in which the configuration of the baffles is fixed randomly within parameters which the player can set.