This image created with the
spectrum intercept algorithm
is based on the dynamical system characterized by a pair of coupled equations, x'=a*x*(0.1-y2)+b*y
where x' and y' are the first derivative of x and y with respect to time, t.
The parameter values are, a=10, b=0.7, c=-1, d=0.25, ω=3.14, and φ=0.
This image differs from the Stretched image by ω=3.14 rather than 2 and the domain being different.