Feeling that I am still new to PSP, this tutorial is being written for beginners with a basic and limited understanding of its many ways of creating graphics. It is very detailed, so please, do not be intimidated by the long lists of instructions. Hope you have as much fun with this as I have had putting this tutorial together. Undo is our Friend. Flood fill the selected area.
Flood fill the same as for the floor layer.
Your Image and Layer Palette will look likethis.