If you want the ribbon to go around the entire circumference of your cake, go around the cake with the proper width fondant strip, then cut your ribbon “legs” and add them to the front of the cake (at this point you can fold them any way you prefer since the fondant will still be pliable) and then add the ribbon loops, which I would do ahead of time so they are dry and hold their shape. Lastly, you add your brooch with Royal Icing. There may be easier ways to do it, but this method usually works for me. Send us a picture!
DJ - Fun Fiesta Cakes