Here is the Dark Tower theme...roses of course.  Here you'll fins keys, roses, doors...all kinds of things.  And of course the bends o' the rainbow.  (Beware of Black Thirteen....)

And a special disclaimer for this theme: I claim no ownership of the copyrights, nor am I making any money from this theme.  It was done for entertainment as a fan tribute.

Here is another version of the Dark Tower theme.

Note that these are only two possibilities: all available graphics are here.