f = open ('file')
xml = open ('background-1.xml', 'at')

prev = None
for img in f:
    img = img.strip ()
    if prev is not None:
        xml.write ('''\
  <static>
    <duration>595.0</duration>
    <file>''' + prev + '''</file>
  </static>
''')

        xml.write ('''\
  <transition>
    <duration>5.0</duration>
    <from>''' + prev + '''</from>
    <to>''' + img + '''</to>
  </transition>
''')
    else:
        first = img

    prev = img

xml.write ('''\
  <transition>
    <duration>5.0</duration>
    <from>''' + img + '''</from>
    <to>''' + first + '''</to>
  </transition>
''')

xml.close ()
f.close ()