And now we're dealing with not a single gene, but we have millions of each of one of these genes. So we have many, many of these green genes, we have many of these purple genes, we have many of the red genes and we have many of these orange genes. And so now we have a collection of these genes that constitute the DNA for this particular organism. And that's exactly what we mean by a genetic library. A genetic library is basically a collection of all the different genes that are found within that particular organism's DNA. And this is how we basically create a gene library.