Fire up your paint program.

Lay in some color, any color, but limit your colors and try to make them harmonious.. Use different size brushes so you'll get different shapes. Don't worry about a thing.

You're not drawing. You're playing.

picture of abstract landscape

After you've done this, run some filters.

I used HSL&HSB, HSB-->RGB

I had a pretty good idea what I wanted to do with it, believe it or not. When I cocked my head, it reminded me of Clifford Sill's Torn Curtains series, so I rotated it

90 degrees CCW

Look at it now.