Singular Spectrum Analysis with "n" time steps ahead

I have a univariate time series with 133 time steps. I want to predict 'n' time steps ahead with singular spectrum analysis (SSA). I am following the code given on https://in.mathworks.com/matlabcentral/fileexchange/58967-singular-spectrum-analysis-beginners-guide, but i am not able to understand how to predict n time steps ahead with SSA through this code. Where n = 1, 2, 4, 8, 12, 24 and 36