int y1 = Math.abs(_random.nextInt() % _matrixHeight);
IntHolder location0Value = new IntHolder();
IntHolder location1Value = new IntHolder();
Control control = OTS.current().get_control();
_matrix.get_value(x0, y0, location0Value, control);
_matrix.get_value(x1, y1, location1Value, control);
_matrix.set_value(x0, y0, location1Value.value + d, control);