These are my straight-line pairs. The top one is random, middle is progression, and the bottom one is balance. All these pictures were taken on the outskirts of the power and light district. Random is the supports of a billboard I believe, and I was hoping to establish a mirroring of the top to bottom posts with my lines. Progression is a picture of a air conditioning unit, from the side, pretty obvious comparison. Balance also is fairly obvious, the lines in the sheet metal siding complements the lines in the study.