input mp-solid

figureespace(-10u,-10u,10u,10u);
Initialisation(50,-110,10,100);
outcolor:=0.5[orange,white];
incolor:=0.25[gris,white];
draw Sparam("(u,v,u*u-v*v)",-1,1,0.05,-1,1,0.05);
finespace;
end