1<HTML> 2<HEAD> 3<TITLE>Chart::PNGgraph.pm - example 2-1</TITLE> 4</HEAD> 5<BODY BGCOLOR="#FFFFFF" TEXT="#000000"> 6 7<H1 align="center">Chart::PNGgraph.pm - example 2-1</H1> 8 9<hr> 10 11<p align="center"> 12<img src="sample21.png"> 13<p align="center"> 14 15<p align="center"><a href="sample21.pl">The code.</a></p> 16 17<hr> 18 19</BODY> 20</HTML> 21