Mean Annual Precipitation in Georgia

I wanted to add tinting in between my isolines, but despite very good directions on doing so, I was unable to accomplish. I am adding this to my list of things I would like to be able to do. My legend is simple text (as per the lecture pdf) due to having labeled lines without any further detail. The isolines are in increments of 5" starting with 45 and progressing to 70. Even without tinting, I believe this map accomplishes it's intended purpose. The user should be able to decifer the pertinent information.