All this pictures are generated with QuicksBasic, except for 
  BASGOTYOU_RAAR.gif. (QBasic and some editting with Jasc PaintShopPro)
  Kunst.gif           (paint in win 3.1)
  loglog.gif          (VBasic6 and some editting with Jasc PaintShopPro)
  loglog.gif

Most pictures are the result of simple dynamical systems.