Spinning Triangles

I slipped out through the loose porch screen and scampered straight to a massive glazed ceramic planter by the steps. Balancing along the smooth curved rim, I found a tall plastic pinwheel planted firmly in the dark potting soil! Each fin was printed with sharp, alternating stripes of magenta, lemon yellow, and cyan. I leaned forward on tiptoes and gave the bottom vane a hearty swat with both paws. Whirrr-click! The wheel leaped into a furious spin, blurring the geometric wedges into a glowing ring that fanned a sudden, cool puff of air right across my face.