Because you need to be grooooovy...
One in unopened package vintage 1970s decor Yellow Flower Rubbermaid Decorator Appliques or Tile Decals.  Contains 12 appliques on transparent film.  Directions on back.  Package dated 1974. 
From back: "Rubbermaid Decorator Appliques add a new touch of color to your bathroom.  Fit standard 4 1/4 tile.  Shown here are a few suggested arrangements and other uses in addition to the tub and shower area."    It shows 8 different ideas.
You can cut them before removing the backing to make them fit odd spaces... 
Pretty nifty.  Enjoy!