game_of_life_2

n = 15

A = randi([0 1], n,n)

while 1
    spy(A)
    
    % here is the logic of dead or alive
    % we will check full row first, then we will move to next column
    for i=2:n-1
        %fprintf('%d\n', i)
        for j=2:n-1            
            % we take a 3X3 matrix

            
            row_start = i;
            column_start = j;
            
            %{
            fprintf('\n%d %d', i, j);
            fprintf('\n%d', temp_sum);
            fprintf('\n%d', A(i,j));
            
            %}
            temp_matrix = A(row_start-1:i+1, column_start-1:j+1);
            temp_sum = sum(sum(temp_matrix));
            
            
            if A(i,j) == 1 && temp_sum < 2
                A(i,j) = 0;
            elseif A(i,j) == 1 && temp_sum > 3
                A(i,j) = 0;
            elseif A(i,j) == 0 && temp_sum == 3
                A(i,j) = 1;
            end
            
%             fprintf('\n%d', A(i,j));

            
%             display(temp_matrix);
%             pause(2);
        end
    end
    
    pause(2)
    
end