//Zihao_Ke.bvr\n\n//Parametric surface\nh=parametricSurface\nh.setMinMax=s,0,7\nh.setMinMax=t,0,4\nh.setEquation=x,(4*cos(s)*sin(t))\nh.setEquation=y,(4*sin(s)*sin(t))\nh.setEquation=z,(4*cos(t))\nh.setSegmentCount=40\nh.color=green\nh.spawn\n\n\n// Parametric curve\nhelix=parametricCurve\nhelix.setMinMax=t,0,7\nhelix.setEquation=x,(3)\nhelix.setEquation=y,(sqrt(7)*sin(t))\nhelix.setEquation=z,(sqrt(7)*cos(t)) \nhelix.setSegmentCount=70\nhelix.setThickness=0.2\nhelix.color=red\nhelix.spawn \n\n\n//Parametric surface\nv=parametricSurface\nv.setMinMax=t,-5,5\nv.setMinMax=s,-5,5\nv.setEquation=x,(3)\nv.setEquation=y,(t)\nv.setEquation=z,(s)\nv.setSegmentCount=20\nv.color=blue\nv.spawn\n