_target = new Polygon(0.5, 1.0, 1.0, 0.0, x, y, 4);
_target->set_position(_square_size/2, _square_size/2 + (world_height - _square_size) * drand48(), 0);
_target->set_speed(0, 0, 0);
_target = new Polygon(0.5, 1.0, 1.0, 0.0, x, y, 4);
_target->set_position(_square_size/2, _square_size/2 + (world_height - _square_size) * drand48(), 0);
_target->set_speed(0, 0, 0);