LIFE.HL 6/4/76 LIFE - GROWTH PATTERNS: DEVISED BY JOHN CONWAY OF CAMBRIDGE U. AND DESCRIBED BY MARTIN GARDNER IN THE MATHEMATICAL GAMES COLUMN OF SCIENTIFIC AMERICAN OCTOBER 1970. "THINGS" THAT CAN CHANGE ARE PLACED IN LOCATIONS ON A SURFACE THAT IS DIVIDED LIKE A CHECKERBOARD. RESPONDING TO THEIR NEIGHBORS PRESENCE OR LACK OF IT, THEY REPLICATE, DIE, OR SURVIVE IN THE NEXT GENERATION ACCORDING TO THE RULES OF LIFE. IN THE PDP-12 VERSION, THE POPULATION OF EACH GENERATION IS DISPLAYED IN TURN ON THE OSCILLOSCOPE SCREEN. RULES OF LIFE:- BIRTH.......AN EMPTY LOCATION ADJACENT TO EXACTLY THREE LIVE NEIGHBORS WILL CONTAIN A NEW LIVE THING IN THE NEXT GENERATION. DEATH......1) BY OVERPOPULATION...IF THE THING HAS 4 OR MORE NEIGHBORS. 2) BY ISOLATION...IF THE THING HAS 1 OR 0 NEIGHBORS. SURVIVAL....NO GROWTH IF THE THING HAS 2 OR 3 NEIGHBORS PROGRAM STARTS WITH A DOT CURSOR IN THE UPPER LEFT CORNER OF THE SCREEN. ****** TTY KEY ACTION ***** (A) MOVE THE DOT ON THE SCREEN INCREMENT DOWN...D UP.....U LEFT...B RIGHT..G RIGHT SIDE........E LEFT ........F (B) FIX "THINGS" IN PLACE ON THE BOARD DROP A COLUMN.....V ERASE IT.....CTRL V DRAW A ROW LEFT.........N RIGHT........R ERASE IT....CTRL R ....CTRL N PLACE ONE THING....A PERIOD(.) ERASE ONE THING....RUBOUT START COMPUTING AND DISPLAY....SHIFT 3 STOP COMPUTING ................SHIFT 5 ERASE DISPLAY.....K 76 LIFE - GROWTH PATTERNS: DEVISED BY JOHN CONWAY OF CAMBRIDGE U. AND DESCRIBED BY MARTIN GARDNER IN THE MATHEMATICAL GAMES COLUMN OF SCIENTIFIC AMERICAN OCTOBER 1970. "THINGS" THAT CAN CHANGE ARE PLACED IN LOCATIONS ON A SURFACE THAT IS DIVIDED LIKE A CHECKERBOARD. RESPONDING TO THEIR NEIGHBORS PRESENCE OR LACK OF IT, THEY REP