Simulink For Iterator

Im trying to use the for iterator in simulink an dI have found that I don't know what the heck I'm doing. Can someone in magic land help. heres what I want

mu = [.3 .6]

[a1 a2] = size(mu)

for i = 1:a2

     f(1,i) = mu^2;
end

screen shots would be AWESOME!!!