...create an input picture


The input picture encloses the data in the input grid. The input grid is located on the left side of the simulator. It contains two types of cells: regular cells are shown as squares and boundary cells as rectangles half or quarter the size of a normal cell.
The initial input values are  -1.0 (white) and the default drawing value is 1.0 (black).  There are many ways to create a new input image:

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