Cobweb plotter

This applet performs cobwebbing for a first-order difference equation .
Enter the function in the box, and choose an initial condition by dragging the point on the x-axis or typing a value in the textbox. Click 'Iterate' to perform the next step in the cobwebbing. Zoom and move the view using the buttons at the right, or hold 'Shift' and click & drag in an empty region. You can click 'Reset' to delete the cobwebs, or enable 'Show details' to see the cobwebbing process step-by-step. Based on an applet from Math Insight: