Here is an icon I found and loaded it up for my fountain. That same website has a bunch of variations as well.
https://img.freepik.com/premium-vector/water-fountain-icon-logo-vector-design-template_827767-158.jpg
The problem I have with it is that when the fountain is on, I want it to turn red, but setting it to do that just overwrites the entire box with solid red. I could make a second icon that is red, but as far as I can tell, you can only upload an icon from a url. While I could probably figure a way to load an image to a website so that it is accessible by url, is there an easier way?
Other issue is that since it is not the default icon, I can only configure a custom icon in the advanced settings section which are triggered to appear only when the conditions you set are met. Since it takes a few seconds for the status of the node to populate, it defaults to the standard icon and then only shows the custom icon after the value is populated.
@Javi