How to assemble and connect a Raspberry Pi 4 (Model B 4 GB) DIY

[Audio Configuration]

Fan red wire goes to pin 4. Fan black wire goes to pin 6.

~/Desktop/blog.desktop

[Desktop Entry]
Type=Link
Name=TAGENIGMA Blog
Comment=blog
Icon=/usr/share/pixmaps/openbox.xpm
URL=http://tagenigma.com/blog