Аннотация:The detailed continuous fast optical photometry analysis obtained by MASTER GlobalNetwork for the GRB160625B optical counterpart MASTER OT J203423.51+065508.0is presented. There are also hard X-ray and gamma-ray emission obtained by theLomonosov and Konus-Wind spacecrafts detectors. We detected quasiperiodic emissioncomponents in the intrinsic optical emission of GRB160625B and propose a three-stagecollapse scenario for this long and bright GRB. We associate quasiperiodic uctuationswith forced precession of a Spinar, i.e. self-gravitating rapidly rotating super dense body,whose evolution is determined by a powerful magnetic eld. The spinar's mass lead itto collapse into a black hole at the end of an evolution.