info.clear();
var model = project.current_model();
model.add      ('Water-fSPC.mlm');
atom = model.atom(0);

info.append ('is a backbone atom : ' + atom.is_backbone ());
info.append ('has a charge :       ' + atom.charge ());
info.append ('element :            ' + atom.element ());
info.append ('coordinates :        ' + atom.x () + ' ' + atom.y () + ' ' + atom.z ());
info.append ('bound atoms :        ' + atom.bound_count ());
info.append ('1 atom :             ' + atom.bound_atom (0).element ());
info.append ('2 atom :             ' + atom.bound_atom (1).element ());
info.append ('1 atom bound with O : ' + atom.bound_with (atom.bound_atom (0)));
info.append ('1 atom bound with 2 : ' + atom.bound_atom (1).bound_with (atom.bound_atom (2)));

info.append ('');
info.append ('Now change properties. ');

atom.set_charge (-1);
atom.set_element ('N');
atom.set_x (1);	atom.set_y (2);	atom.set_z (3);
info.append ('has a charge :       ' + atom.charge ());
info.append ('element :            ' + atom.element ());
info.append ('coordinates :        ' + atom.x () + ' ' + atom.y () + ' ' + atom.z ());

info.append ('');
