I denuded sunflowers and delphiniums of their petals. They were then individually coated with petroleum jelly, which acted as both an adhesive and a way of sealing in the moisture, thus sustaining the life of the window display.    Every single petal was placed by hand on the window.     The &#x27;blown circle&#x27; design was chosen as a contrast to the grid-like urban environment in which the shop is located and as a way of revealing the petals as they float away.