There are 3 projectors, one each for the top, left, and right sides of the ring. Each projector is meant to show an image so that together the ring has a particular year's design projected on it.

The projectors thus have to show the correct image at the right time. They load the images via a simple web page with javascript to control the timing.

The web page and images are loaded onto the /var/www directory in the Pi, which is running an Apache web server. A chromium browser is launched when the Pi account desktop loads. That browser is in kiosk mode, full screen.

The following things are loaded onto the Pi

• apache2
• emacs
• python-requests
• python-pip (?)
• python-setuptools (?)
• chromium
• https://github.com/wyrmiyu/ddns-tools/tree/master/dnsmadeeasy

These files are in the extras directory in the repository and need to be moved into place.

/etc/network/interfaces
/etc/wpa_supplicant/wpa_supplicant.conf
/home/pi/.config/lxsession/LXDE-pi/autostart