While I do not intend to re-concept of the original article, I will again, the concept behind the PDF format, to illustrate the need to add images and 'round rectangles'.
This is a PDF format of the tag will generate if you download and run the attached code sample.
Do not forget, even if you can read a text editor marks, is a PDF is actually a binary file, (not including the simplest case) must be treated as such.
It is a software tool to create and deal with SWF file. The SWF file format is Adobe Flash to use (Macromedia Flash's predecessor), animation software. SWFTools runs on Windows, Mac OS X, the first thought, Linux and other Unix-systems.
SWFTools distributed in the terms of GNU General Public License, and therefore free software.
In addition, SWFTools contains a number of tools to convert PDF format, JPEG format, GIF, and WAV, and AVI formats, SWF content, and others from an existing SWF files of information and content.
Related knowledge of photo editing software: