1.cs

Transaction editDatabase = editor.Document.Database.TransactionManager.StartTransaction();
CreateSphere(editDatabase, new Point3d(1000, 1000, 0), 100);
Point3d currentCenter = new Point3d(0, 0, 0);
double u = 0;
while (u < Math.PI * 1000)
{
    double x = u,
        y = Math.Cos(u) + Math.Sin(Math.Sqrt(3)*u),
        r = Math.PI / 100;
    currentCenter = new Point3d(x, y, currentCenter.Z);
    CreateCircle(editDatabase, currentCenter, Vector3d.ZAxis, r);
    u += r*2;
}
editDatabase.Commit();