"The bar graph that runs along the bottom represents all of the chapters in the Bible. Books alternate in color between white and light gray. The length of each bar denotes the number of verses in the chapter. Each of the 63,779 cross references found in the Bible is depicted by a single arc - the color corresponds to the distance between the two chapters, creating a rainbow-like effect." ~ Harrison
Isn't that gorgeous?! But you know what is also pretty neat? This only maps a fraction of the cross references in the Bible. There are literally hundreds of thousands more! What an amazing work the Word of God is!