Need help with background

I am making a ps3 theme and I want to have the background in a certain order and change every couple minutes if possible seconds.
This is what im trying to do.

HH Format
With this configuration, the specified background image will be
displayed when the time on the PlayStation(R)3 is 0:mm to 5:mm,
with mm indicating minutes. Specify the values for “from” and
“until” in 24-hour notation (00-23).
When “days” and “datetime” are specified, but the date/time on the
PlayStation(R)3 does not fall into either of the specified time
periods, the background image of the first element will be displayed.

This is what I have

[url]http://pastebin.com/rJFQxtn0[/url]

But all it is doing is choosing a random order and not changing.