Buttons
- KL Step: does one step of KL process (vertigo-horrid)
 - Clear: removes red cobweb, retains current value of X
 - Reset: removes red cobweb, resets X to slider value X0
  
Sliders
- When you move the R slider, you:
  
  - adjust the control parameter [ R in the logistic function, R*X*(1-X) ]
  
 - redraw the green graph of the logistic function, X between 0 and 1, and
  
 - clear the screen of the red KL web
  
 - BUT, the current value of X is remembered.
  
  
 - When you drag the X0 slider, you:
  
  - Change the value of X0 for the next Reset click
  
 - Leave the red cobweb and current value of X in place
  
  
  
Suggestions
Experiment with values of R everywhere, but especially:
- R in [0.5, 2.8]: an attractive fixed point
 - R around 3.2: an attractive 2-periodic cycle
 - R around 3.5: an attractive 4-periodic cycle
 - R in [3.6, 4.0]: lots of chaotic behavior
 - R around 3.83: an attractive 3-periodic cycle
  
Experiment with a few different values of X0, eg:
- 0.5 (sorry for typo!!)
 - in interval (0.0, 0.5)
 - in interval (0.5, 1.0)
  
 
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