Well I decided to use the spiral suggested in the previous comments...
t = linspace(0,(rand()*4 +1)*pi,100);
k = rand()/2;
laminatedx = t.*cos(t) + k*rand(size(t));
laminatedy = t.*sin(t) + k*rand(size(t));
h = plot(laminatedx,laminatedy);
set(h,'linewidth',30);
set(h,'LineStyle','-.');