1.   Despite the peace of the early night, lightning was flickering about the horizon.

2.   Lightning flickered across the sky, followed seconds later by a loud crack of thunder.

3.   Lightning flickered noiselessly in the western sky.

4.   Overhead, lightning flickered frequently as the static electricity accumulating in the ash cloud discharged.

5.   Now and then lightning flickered through the gloom, the lights dimmed, and thunder rattled every loose panel and plank in the building.

6.   Lightning flickered across the Tuscan sky.