Affectation de couleurs variables avec plot

x =[0:5:100];
y = x;
figure(1)
hold on ; 
grid on ;
plot(x,y); 
h=plot(0,0,'o','MarkerSize',12,'MarkerFaceColor',[1 0 0 ],'Markeredgecolor',[1 0 0]);
axis([0 1 0 1]);
axis square on

for i=1:100; 
    set(h,'xdata',0.01*i,'ydata',0.01*i)
    pause(0.025)
end

 ~waitforbuttonpress
    if g==i;
        set(h,'FaceColor',rand(1,3))
    end