ZX81 STILL ALIVE
With and only the "basic" black, white, gray and the characters available on a ZX81, I was able to create some very pleasant and unusual graphics. As example look at the brickwall in the program "ZXOKO-BAN", the grid in "ZX-A-MINE" or list line 9990 of any of the program available at "http://www.zx-team.de/andre". "INZXEC" has more of a variety of graphics. Remember also that this program has a HUGE 36 different mazes to solve, all included in only 16kb of ram.
Hope to hear from you soon, ANDRExxx