Matlab - Ruleta ganadora

a=figure;

t=pi/4;

b=annotation(a,'arrow','HeadWidth',30,'HeadLength',50,'x',[0.5 0.5+0.3*cos(t)],'y',[0.5 0.5+0.3*sin(t)]);

bb=linspace(0,2*pi,9);

T=randi([100 200]);

i=1;

while T~=0

    t=bb(i);

    set(b,'x',[0.5 0.5+0.3*cos(t)],'y',[0.5 0.5+0.3*sin(t)])

    if i==length(bb)

        i=1;

    else

        i=i+1;

    end

    T=T-1;

    pause(0.01)

end

disp(i)