Annie was in the second row, her face a blank white circle under her cap with its black stripe.

He looked at their faces and saw only pasty-pale blank circles, ciphers, big white holes in the universe.

You will note that the message begins with a blank circle and ends with one.

The second peculiarity was the intervals existing between blank circles.

The third was the fact that no two blank circles appear together.

So I eliminated all the blank circles and made this revised message.

The pencil, moved by steady fingers, inscribed a blank circle.

Only the ominous blank circle remained at the top of the page.

The artifact was a blank circle, mysterious, framing only stars.

She stepped up to the center of the forward line, which had one blank circle.