Initial commit
Initial version

Basic implementation without any interactivity
Experiment: generate squares from all levels
Exp: semitransparent squares and new transition
Exp: random colors
Added continuous generation of random seeds
Added control square and changed styles/texts
The control square now shows the seed
Added new "st" attribute to rectangles
Refactored animation interval / deleting of nodes.
Implemented control buttons
Changes in styles
Update README.md
Added identity function to data squares
Merge branch 'master' into gh-pages