you can generate a color scale by using the different types of colors like hsv, jet, bone, gray, etc. then depending on the time sements or whatever your desire of colors are you can then get that color. see example of each time step has a different color:
t = 0:.1:1; %setup time
clors= hsv(numel(t)); %create a color map of different color for each time
figure(1),clf,hold on
for ind =1:numel(t)
plot(t,t(ind)*t,'Color',clors(ind,:)); %dummy plot to show that each plotted line changes color
end
hold off
