Network - animated SVGCSS snippet
This SVG is suitable for website background areas. It is responsive (if you don't look too closely). However, I recommend using it in landscape formats such as 4:3, 16:9, etc.
Since the source code is very long, I won't copy it here. Just look inside the file itself. I've worked with nested groups, spacing and + selectors. Colors can be adapted to your color concept using the styling information in the SVG.