Linear uses three possible colours (='states') for each position (cell). The colour of each cell depends on the colour of the cell above it and the cell to the top right of it. You can set and change this dependency at the left border.
Click the 'R' button to automatically randomise the rules.

To setup the top row, you can either click the top row or click the input rows at bottom.
Click the 'Random' button to create a random setup.
NOTE: to speed up input, white (empty positions) are treated as yellow! So you do not have to draw any yellow positions! (In practice, playing with the two randomizing options creates so much variety that you might never use the manual input).

When you are ready, click the 'Run' button to fill the screen.
You can click the Run button repeatedly, the bottom row will be used to create the top row (wrap-around screen). Also, the screen wraps around from right to the left border.

The default board size is 80x80. The other variants offer you board sizes of 10x10, 25x25, 50x50 and 100x100.

Please note that there are two additional piece sets available.

The board design is based on the one used by W.D. Troyka in his game 'Rule 110'.