input mp-solid

figureespace(-10u,-10u,10u,10u);
Initialisation(500,-30,15,75);
outcolor:=0.5[red,white];
incolor:=0.5[jaune,white];
draw Sparam("((1+0.5*cos(u))*cos(v),(1+0.5*cos(u))*sin(v),0.5*sin(u))",-pi,pi/12,pi/15,2*pi/3,2*pi,pi/20);
finespace;
end