Mark Knol uses Flash and Actionscript to create his art. These pieces are very nice. Most appear to be using a variant of ribbon code. Some of his works are for sale.
Check out more of his work on Flickr.
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Projects
Postmodern Modernist
Bombshell
Agendas Under Fire
110th Assembly
Meret Oppenheim portrait
Image Reconstruction
Ready Made Glitch
Slit Scan 3d Images
Systemic Sky
Slit Scan Photography
Monochrome Generator
Space Filling Curve Art
Hair Particle Drawing
Generative Flowers II
Systemic Abstractors
The Reductionizer
Contextual Art Generator