@Jona The dream-seq is now also working:
dream-seq.pd (updated)
The formula is the "Kings Dream" fractal taken from http://softology.com.au/tutorials/attractors2d/tutorial.htm. There are some more interesting formulas on that page.
Some parameters give decent results. For some parameter combinations it is better to turn motion off so it would not converge against a less interesting figure.
Update:
Now there is a toggle "symmetry". When it is checked the parameters on the left will also set the parameters on the right. The right ones are still free. Also changed the plot to bezier curve. It doesn't plot through the nodes, but is still nice. 
