Add a legend in plotting

I want to add a legend in my plotting, in the explanation I want to add some kind of text 500 years, 1000 years, 2500 years and 5000 years.

My code is:

for i=1:length(Tm2)
plot(Tm1(:,1),(SA10(:,1)),'r');
hold on
plot(Tm1(:,1),(SA5(:,1)),'b');
hold on
plot(Tm1(:,1),(SA2(:,1)),'g');
hold on
plot(Tm1(:,1),(SA1(:,1)),'m');
hold on
title UniformHazardSpectra50Year
xlabel('time');
ylabel('Acceleration');
legend(500,1000,2500,5000);
end

Is there anybody can help me, why it doesn't works. The result is weird.

Answer 1

[Walter Roberson]

legend('500','1000','2500','5000');

[Skydriver]

Okay thanks, It works.

Answer 2

[Skydriver]

This is my plotting :)