Final answer:
In a pattern of blue circles interrupted by one red square, the red square serves as a visual anomaly creating emphasis, which artists use to create rhythm and movement in their work.
Step-by-step explanation:
When a pattern of blue circles is interrupted by one red square, this represents an instance of a visual anomaly within a pattern, creating a point of emphasis or focus for the observer. Such use of contrasting shapes and colors is often employed by artists to build a sense of rhythm, symmetry, and movement within a piece.
The red square stands out against the repeating blue circles, drawing the eye and perhaps conveying a message or feeling intended by the artist. This technique is not dissimilar to the concept described in "Blue Cross with Red" (6.7.9), where broken lines and a bold red square amid a blue background create a dynamic flow in the artwork, causing the viewer's eyes to continually return to the central square.
Similarly, contrast and pattern interruption are elements that artists like Dr. Vaxon use to depict movement, order, and chaos within their compositions.