About the ExamplesRun pngtest. Some .png images will be produced. Open them with anygraphics program or even a web browser and take a look. To find out what isgoing on, explore the Makefile and the pngtest.cc source. Both have manycomments. The pngwriter.h header file is fully commented as well,and should you lose the PNGwriter Quick Reference, or be without internetaccess to check the website, it will serve as a reference manual.If you feel like it, take a look at the pngwriter.cc source. The makefile isfully commented as well.The lyapunov.cc source file has an explanation of what is being generated.Alternatively, you can get info on its usage by running lyapunov with noarguments. If you wish to see what is going on, you can run it with./lyapunov 999and it will show an onscreen explanation.