Ring malfunction

TEXT: args[0] = 6
TEXT: args[1] = 1
TEXT: args[2] = 5

function main(args) {
  var innerRadius = args[0]*MM;
  var thickness = args[1]*MM;
  var width = args[2]*MM;
  var ring = Ring(innerRadius,thickness,width);
  var grid = createGrid(-8*MM,8*MM,-3*MM,3*MM,-8*MM,8*MM,0.1*MM);
  var maker = new GridMaker();
  maker.setSource(ring);
  maker.makeGrid(grid);
  return grid;
}