## Instructions

The Hopalong Attractor is defined by these two equations:

x_n+1 = y - 1 - sqrt(abs(b*x - 1 - c))*Math.sign(x - 1)

y_n+1 = a - x - 1

Change the values of the parameters a, b, c, and d by using the sliders.

Key 'r': Redraw with a random set of parameters.

LEFT_ARROW: Draw with few points (faster).

RIGHT_ARROW: Draw with many more points (slower).

Key 'e': Save a high-resolution PNG of the current image.

Key 'a': Increment the number of points.

Key 's': Decrement the number of points.

## The p5js code

This p5js code is scrollable.