Pi symbols formed by brick stacks with unique features and shadows.
An outdoor downward angled view of two sets of three bricks set up, each creating a pi symbol. The red bricks in the back are larger and bullet style. The two side stones have their rounded edges upwards, and the top cross stone has its round edge towards the left. The left and top stones are facing away as the right stone is facing the camera, making the indention around the rounded edge visible. The smaller bricks and front each have two cylindrical bulges on his camera facing side. Shadows of each stack fall onto the tan sandy surface towards the upper left from the sun shining from high and towards the right.