x:(2+cos(u*0.5)*sin(v)-sin(u*0.5)*sin(2*v))*cos(u);
y:(2+cos(u*0.5)*sin(v)-sin(u*0.5)*sin(2*v))*sin(u);
z:sin(0.5*u)*sin(v)+cos(u*0.5)*sin(2*v);
plot3d([x,y,z],[u,0,%pi*2],[v,0,2*%pi],[axes,false],[box,false],\
   [palette,get_plot_option(palette,3)],[elevation,30],[legend,false],\
   [gnuplot_term,svg],[gnuplot_out_file,"~/Desktop/test.svg"]);