This supertoroid sweeps the curve X¹⁰ + Y¹⁰ = 1, a square with rounded corners, around a circle of radius 4. In polar form the section is Rⁿ(cosⁿ v + sinⁿ v) = 1, and n must be even: for odd n the bracket vanishes at v = 3π/4. The section turns through tu as u goes round,