printing different coloured graphs from the same running loop

I'm trying to get colored graphs from the same loop:

for i=1:8, sys=ss(A,B,C,[]); [y t x]=initial(sys, X(:,i)); plot(x(:,1),x(:,2)); axis ([-20 20 -20 20]); grid on; hold on; end

*The loop plots response graphs for different initial conditions (each time with different initial condition), can I somehow make each graph different color?

Thanks in advance, Phil