Generated with the following Python script, using the anim_framework classes:

#!/usr/bin/python3
import sys
import colorsys
import anim_common
import anim_lissa

anim_duration = 18.0
width = 512
height = 512
frame_rate = 25.0
nr_steps = 500

lissa = anim_lissa.make_draw \
  (
    x_amp = 200,
    x_freq = 4,
    x_phase = anim_common.linear_interpolator(0, anim_duration, 0, 1),
    y_amp = 200,
    y_freq = 3,
    y_phase = 0,
    nr_steps = nr_steps,
  )

def anim_init(g) :
    g.translate(width / 2, height / 2)
    g.set_line_width(4)
#end anim_init

def init_frame(g, t) :
    g.set_source_rgb(1, 1, 1) # background colour
    g.paint()
    g.set_source_rgb(*colorsys.hsv_to_rgb(0.25, 0.9, 0.9)) # curve colour
#end init_frame

anim_common.render_anim \
  (
    width = width,
    height = height,
    start_time = 0.0,
    end_time = anim_duration,
    frame_rate = frame_rate,
    draw_frame = anim_common.draw_compose(init_frame, lissa),
    overall_presetup = anim_init,
    out_dir = "frames",
    start_frame_nr = 1
  )

I, the copyright holder of this work, hereby publish it under the following license:

This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.

The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission. http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse