Digital art is still in it's infancy and there are many iterations of how one creates art digitally.  Some write code and others draw images electronically.  Some of us use digital editing applications to create images.  I begin each new images with a digital photograph I have taken.  Then through manipulation and addition of design elements and color, I create each piece. I consider PhotoShop my canvas and through "Jackson Pollock" like processes I create what speaks to me.  Enjoy.