//gradient_play.bvr\nv=vectorField\nv.setInterval=x,1.0\nv.setInterval=y,1.0\nv.setInterval=z,1.0\nv.setMinMax=x,-2,2\nv.setMinMax=y,-2,2\nv.setMinMax=z,-2,2\nv.setEquation=x,(1000*y)\nv.setEquation=y,(-1000*x)\nv.setEquation=z,(0)\nv.color=green\nv.spawn\n\nc=parametricCurve\nc.setMinMax=t,0,6.5\nc.setEquation=x,(2*cos(t))\nc.setEquation=y,(2*sin(t))\nc.setEquation=z,(0)\nc.setThickness=0.1\nc.setSegmentCount=20\nc.color=red\nc.spawn