If you need a customization like that including animation then contact me directly by mail for services. Please always provide context, examples: store url, theme name, post url(s) , or any further detail. Contact Info in signature.
If it's a styled spacer between sections just add a custom-liquid section between the other sections using code roughly like below where you add a url from an image used for the background, or replace it with some advanced code for CSS based shapes:
Thanks Paul, I understand the concept but I am struggling with the image link. The image (one crest of the wave) is uploaded to my content Files and I am using the link provided there. Any idea why the code is returning a syntax error? See screenshot attached.