I think sheet music is a good example of a grid structure. Each line of music is equally spaced out horizontally on the page and the right/left sides line up throughout the page. Because music must be read quickly, readability is key. This grid structure strictly separates each line through using white space. Without this repetition, all the music would bunch together and seem impossible to sort through to play. Each white space is the same height and each line of music is the same height. Even the details within the line of music are equally spaced. This is made possible through using a grid structure.
