With whatever round wreath base you choose to use for this craft (foam, cardboard, metal, etc), prep this wreath base by removing any stickers, tags, etc if there are any. You want a clean surface to work with so the glue will stick and the paper will look fresh.
Grab the blue crepe paperin the color you’d like to be what is considered the “base color” ie the one that will be dominant and underneath all the decor. Prepare long strips of this color of crepe paper to wrap the round wreath base. Add a dab of craft glue to the end of the crepe paper to start, secure it underneath the wreath, and begin to wrap.
Don’t worry about the length of the strips, you can always trim and add strips where needed if the current strip ends while wrapping. Try to keep the wrapping nice and wrap overlapping evenly.
Once the entire wreath base is covered with crepe paper strips wrapped evenly around it, overlap the starting point by about an inch and then apply a dab of glue at the end underneath to secure the wrapping.