I have numbered paragraphs which start with the word Step followed by a sequence field.

Step {SEQ MyStep }

1.1. Step 1
1.2. Step 2
1.3. This is a paragraph without a step
1.4. Step 3


1.5. This is a paragraph without a step
1.5. Step 4
etc

How can I loop through the numbered paragraphs turning the Step 1 etc into bookmarks? It would be nice to have the bookmarks named MyStep1, MyStep2 and so on.