How do I plot one legend item for multiple plots?

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How can I label multiple plots with one legend item?

For example, I have 5 different plots and I want my legend to only contain "random plot is even" and "random plot is odd" and the plots with the same label should have the same colour. The only solution I found that comes close to it is below. The problem is that the labeling of the plots occurs multiple times and the plots with the same label have different colours.

clear all; close all;
figure; hold on;
for iter =1:5
    rand_iter = rand(1,5);
    plot(rand_iter)
    if(mod(iter,2))
        legend_iter{iter} = sprintf(['random plot is ', 'odd']);
    else
        legend_iter{iter} = sprintf(['random plot is ', 'even']);
    end
end
legend(legend_iter)