Edit File: default.xml
<background> <starttime> <year>2012</year> <month>06</month> <day>4</day> <hour>7</hour> <minute>00</minute> <second>00</second> </starttime> <!-- This animation will start at 7 AM. --> <!-- We start with sunrise at 7 AM. It will remain up for 1 hour. --> <static> <duration>3600.0</duration> <file>/usr/share/backgrounds/morning.jpg</file> </static> <!-- Sunrise starts to transition to day at 8 AM. The transition lasts for 5 hours, ending at 1 PM. --> <transition type="overlay"> <duration>18000.0</duration> <from>/usr/share/backgrounds/morning.jpg</from> <to>/usr/share/backgrounds/day.jpg</to> </transition> <!-- It's 1 PM, we're showing the day image in full force now, for 5 hours ending at 6 PM. --> <static> <duration>18000.0</duration> <file>/usr/share/backgrounds/day.jpg</file> </static> <!-- It's 7 PM and it's going to start to get darker. This will transition for 6 hours up until midnight. --> <transition type="overlay"> <duration>21600.0</duration> <from>/usr/share/backgrounds/day.jpg</from> <to>/usr/share/backgrounds/night.jpg</to> </transition> <!-- It's midnight. It'll stay dark for 5 hours up until 5 AM. --> <static> <duration>18000.0</duration> <file>/usr/share/backgrounds/night.jpg</file> </static> <!-- It's 5 AM. We'll start transitioning to sunrise for 2 hours up until 7 AM. --> <transition type="overlay"> <duration>7200.0</duration> <from>/usr/share/backgrounds/night.jpg</from> <to>/usr/share/backgrounds/morning.jpg</to> </transition> </background>