//mobius.bvr\n\n//Parametric surface\nm=parametricSurface\nm.setMinMax=s,-1,1\nm.setMinMax=t,0,6.6\nm.setEquation=x,((3+s*cos(t/2))*cos(t))\nm.setEquation=y,((3+s*cos(t/2))*sin(t))\nm.setEquation=z,(s*sin(t/2))\nm.setSegmentCount=40\nm.color=green\nm.spawn\n\n//Parametric surface\nk=parametricSurface\nk.setMinMax=s,-0.1,0.1\nk.setMinMax=t,0,6.6\nk.setEquation=x,((3.2+s*cos(t/2))*cos(t))\nk.setEquation=y,((3.2+s*cos(t/2))*sin(t))\nk.setEquation=z,(s*sin(t/2))\nk.setSegmentCount=40\nk.color=green\nk.spawn