  We study the general relativistic motion of a bright spot in a jet from an
accreting black hole. The corresponding lensed images of the moving bright spot
are calculated numerically in discrete time intervals along the bright spot
trajectory in the Kerr space-time framework. As representative examples, we
consider the cases of supermassive black holes SgrA* and M87*. Astrophysical
observations of the moving bright spots in the jets from black holes provides
the unique possibility for the verification of different gravitation theories
in the strong field limit.
