As the audio titled "Rectangle" begins, the sound of a sharp instrument etching on a surface emerges. It's a consistent, rhythmic pattern that traces the formation of a shape. You can hear the straight, long lines being drawn, then a swift turn, and another line being drawn. The noise suggests the precise, angular construction of a rectangle. The audio then transitions into a deeper, resonant sound, mimicking the echo you might hear when tapping on a solid, flat surface, reminiscent of a square shape. The stark contrast in sounds paints an auditory picture of a shape that is both elongated yet maintains its structure with four equal sides. The audio continues to play, and the sounds fluctuate between the sharp etching noise and the deeper resonant sound, weaving a complex auditory tapestry. The experience is akin to hearing the birth of a rectangle, the formation of a square, and the interplay between the two. Toward the end, the sounds slowly fade, much