Materials:
a number of large sequins;
thread;
small fan;
light source.
To fill a scene with an array of tiny, flashing lights:
Attach several large sequins to a thread.
Hang the thread (or several) in the background of the scene.
Aim the fan at the sequins, then point a light source directly at them.
Experiment with different colored sequins and gels to get a variety of effects.
