It's easy to miss something your no looking for.
Replace yours with this.
var images = [
'backstretch/FlameArtwork1.png',
'backstretch/FlameArtwork2.png',
'backstretch/FlameArtwork3.png',
'backstretch/FlameArtwork4.png',
'backstretch/FlameArtwork5.png',
'backstretch/FlameArtwork6.png',
'backstretch/FlameArtwork7.png',
'backstretch/FlameArtwork8.png',
'backstretch/FlameArtwork9.png',
'backstretch/FlameArtwork10.png',
'backstretch/FlameArtwork11.png',
'backstretch/FlameArtwork12.png',
'backstretch/FlameArtwork13.png',
'backstretch/FlameArtwork14.png',
'backstretch/FlameArtwork15.png',
'backstretch/FlameArtwork16.png',
'backstretch/FlameArtwork17.png'
];