It's a slight variation of Les Johnson's bargraph routine, which is in his PBP book. You load the "graphics" of the bar graph into lcd memory, then print solid bars (or blocks) until the final one which is printed as the mod of 3. The above bar graphs use a resolution of five, which has the disadvantage of a space between each five. Les' uses three, because it makes the space between the characters an unnoticed and integral part of the graph. If you don't have Les' book, then look for one of the Proton samples, because they ship with it.