R = 4 (slider from 1 to 10, step 0.5)
A = 1 (slider from 0.1 to R, step 0.1)
n = 30 (slider from 2 to 40, step 1)
T: (2 * π / n)
a = CurveCartesian(((R + (A * sin(((2 * π / T) * t)))) * cos(t)), ((R + (A * sin(((2 * π / T) * t)))) * sin(t)), t, 0, (2 * π))