private void doRun(int size) {
    for (int gen = 0; gen < data.length; gen++) {
        for (int row = 0; row <= size - 1; row++)
            for (int column = 0; column <= size - 1; column++) {
                if (column == 0) data[gen][row][column] = 100.0;
                else data[gen][row][column] = 0.0;
            }
        if (gen > 0)
        for (int row = 1; row <= size - 2; row++)
        for (int column = 1; column <= size - 2; column++)
            data[gen][row][column] =
            (4.0 *
            (data[gen - 1][row][column - 1]
            + data[gen - 1][row - 1][column]
            + data[gen - 1][row][column + 1]
            + data[gen - 1][row +1][column])
            + data[gen - 1][row - 1][column - 1]
            + data[gen - 1][row - 1][column + 1]
            + data[gen - 1][row + 1][column + 1]
            + data[gen - 1][row + 1][column - 1]) / 20.0;
    }
}