Hmmm not sure what you mean? What concave exactly?
You just stick the element I created on the top middle of your image (absolutely place it into position).
Very clever @Paul_O_B ; but I would have thought an image would have been easier to use
That would be too easy lol
It wasn't that much code and was fun to do.
You can create a lot of icons without using images but sometimes the time in creating them yourself is not worth the effort.