%Returns a matrix with a value of one randomly added.
%In addition, popcorn returns the row-column coordinate where the latest piece popped
function [pop loc] = popcorn(M)

    columns =  length(M);           %gives length of matrix columns
        rows = length(M(:,1));          %gives length of matrix rows

    random_column = randrange(columns);     %chooses a random column
        random_row = randrange(rows);       %chooses a random row

    loc = [random_column random_row];   %returns random coordinate
    M(random_column, random_row) = M(random_column, random_row) + 1;    %add one at coordinate chosen

end