This is a parametric curve [math]\left(f\left(t\right),g\left(t\right)\right)[/math], where[br][br][math]f\left(x\right)=cos\left(x\right)+\frac{cos\left(px\right)}{a}+\frac{sin\left(qx\right)}{b}[/math] and[br][math]g\left(x\right)=sin\left(x\right)+\frac{sin\left(px\right)}{a}+\frac{sin\left(qx\right)}{b}[/math][br][br]You can change the parameters, a, b, p, q in the algebra window or edit the functions f and g there.