function color_b(ys,analysis)
%displays result of vision_engine_b with colorcoded arc elements
colors='rgbym';
n=length(ys(:,1));ys=[ys;ys(1,:)];
for i=1:n
   v=[i i+1];
   plot(ys(v,1),ys(v,2),colors(analysis(i,1)))
   hold on
end
hold off