Inspirograph is a free online spiral image maker created by Nathan Friend, currently senior frontend engineer at GitLab.
It’s very simple to use. Just choose the size of the fixed and rotating cogs as well as the background and line colors. Also, use a few easy keyboard shortcuts to make spiral images very quickly. Download the images for further use or submit them to the online gallery.
If you want to use a spiral image for dreaming, consider increasing its resolution first.