Pattern is the use of similar or connected pictorial elements, systematically repeated over and over in a consistent way.
In this photo of a tunnel in Space Mountain, I see a tunnel with several repeating lines and walkways. The pattern can be seen in the walkway lights and the guard rails. This pattern conveys a sense of formality in my opinion. This image is appealing to me because it has an ideal and perfect.
In this photo of a chess board, I see a chessboard made of wood with a checkered pattern. The Pattern, can be seen in the pattern of the chess board. This Pattern conveys a sense of uniform in my opinion. This image is appealing to me because it seems very unified and precise.