A________B

What is actually being displayed:

A red circle is displayed for one second at point A.

Display of this circle ends, and for .05 seconds nothing is displayed at either point A or point B.

A red circle is displayed for one second at location B.

Display of this circle ends, and for .05 seconds nothing is displayed at either point A or point B.

This process of alternately displaying circles continues.

NOTHING is ever displayed between points A and B.