input mp-solid

figureespace(-10u,-10u,10u,10u);%
Initialisation(200,20,20,50);
arcenciel:=true;
draw Tuben("(cos(2*t),sin(2*t),sin(t))","(-2*sin(2*t),2*cos(2*t),cos(t))",0.1,0,628,0.01);
finespace;
end