我需要编写一个程序来使用HP PCL 5e / HP / GL2绘制图形

I have read an example and tried to duplicate it's methods but with weird results. This is a 1 shot deal so I do not want to buy a package to do this. Also, it will be executed on a Multi-Valued database in a Basic that not many programmers write in anymore. If anyone can post a small example of this It would be most helpful. Specifically, I need a box centered on an 8x11 paper with the left 1/3 filled in Green, the center 1/3 in Yellow and the last 1/3 in Red. Then Draw a line thru 3 points within each color of the box.I have read an example and tried to duplicate i