Click the Action button to plot iterations 1000-1003. There should be a white box outlining an area of interest after plotting. If you do not see it, just move the mouse a bit. I suspect this is a manifestation of a mismatch between the Java language version in which the applet was written and the Java machine installed on your computer. We are hoping to resolve this with the next revision to the web site.
Notice at a gain of about 3.5 there are now four branches evident. In fact the attractor was there all along but with only two iterations as on the previous display, no points settled on two of the branches. Adding the other two iterations allowed us to illuminate these other two branches. If we were plotting more iterations, more branches would be revealed.