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sl - The Seed7 version of the game of life
The original game of life was invented by mathematician John Conway. The idea
is to initialize the screen with a pattern of bacteria in EDIT mode. The RUN
mode or singlestep commands then bring life to the colony. The population
increases and decreases according to fixed rules which affect the birth and
death of individual bacterium. A rectangular grid (2-dimensional matrix) will
be shown on the screen. Each cell in the grid can contain a bacterium or be
empty. Each cell has 8 neighbors. The existence of cells from one generation to
the next is determined by the following rules:
- A bacteria with 2 or 3 neighbors survives from one generation to
the next. A bacterium with fewer neighbors dies of isolation.
One with more neighbors dies of overcrowding.
- An empty cell spawns a bacteria if it has exactly three
neighboring cells which contain bacteria.
In EDIT mode the following commands are available:
| ← → ↑ ↓ | | Move the cursor |
| H J K L | | Move the cursor |
| M * | | Mark a cell |
| space | | Erase a cell |
| enter | | Calculate next generation |
| B | | Back to previous generation |
| R | | Enter the RUN mode |
| C | | Clear the grid |
| D | | Redraw the screen |
| G | | Load (get) state from file |
| P | | Save (put) state to file |
| I | | Show info pages |
| Q | | Quit the program |
| + | | Scroll down |
| - | | Scroll up |
| < | | Scroll left |
| > | | Scroll right |
| backspace | | Erase cell left |
| tab | | Forward 8 columns |
| shift-tab | | Backward 8 columns |
| home | | First column |
| end | | Last column |
In RUN mode the following commands are available:
| any key | | to enter the EDIT mode to create or change the pattern |
| Q | | to Quit the game of LIFE |
The EDIT and Quit commands take effect only at the end of a cycle.
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