var interval = 5.0; // delay between rotating images (in seconds)
    interval *= 1000;
var random_display = 0; // 0 = no, 1 = yes

var image_index = 0;
image_list = [  // 9 groups of 4 images --- Keep symetrical

["stickers/lefty/ebs-clean-coal.jpg"],		//Limage
["stickers/lefty/ebs-imagine.jpg"],
["stickers/lefty/ebs-republicants.jpg"],
["stickers/lefty/ebs-socialist.jpg"],

["stickers/custom/bioneers-sticker.jpg"],	// Mimage
["stickers/custom/bowdoin-sticker.jpg"],
["stickers/custom/evolve-sticker.jpg"],
["stickers/custom/mofga-farmer.jpg"],

["stickers/bso/EBS-BSO-ROTATOR-AD.jpeg"],		// Rimage
["stickers/guest/drillspillkill-narrow-sticker.jpg"],
["stickers/guest/ebs-blank.jpg"],
["stickers/guest/ebs-immigrants.jpg"],

["stickers/lefty/ebs-own-country.jpg"],		// Limage1
["stickers/lefty/jesus-money.jpg"],
["stickers/lefty/ebs-tea-on-me.jpg"],
["stickers/lefty/consume.jpg"],

["stickers/custom/olpc-sticker.jpg"],		// Mimage1
["stickers/custom/peacebaby-sticker.jpg"],
["stickers/custom/bruces-sticker.jpg"],
["stickers/custom/hep-sticker.jpg"],

["stickers/bso/EBS-MOTHERFER-300.jpg"],		// Rimage1
["stickers/guest/viet-afghan-sticker.jpg"],
["stickers/guest/wtf-dems.jpg"],
["stickers/guest/ebs-vote-darwin.jpg"],

["stickers/lefty/ebs-fox-news.jpg"],		// Limage2
["stickers/lefty/ebs-coming-back.jpg"],
["stickers/lefty/ebs-fries.jpg"],
["stickers/spiritual/ebs-this-car.jpg"],

["stickers/custom/evolve-sticker.jpg"],	// Mimage2
["stickers/custom/mofga-farmer.jpg"],
["stickers/custom/bioneers-sticker.jpg"],
["stickers/custom/bowdoin-sticker.jpg"],

["stickers/bso/EBS-GOT-ORIGINALITY-300.jpg"],		// Rimage2
["stickers/guest/ebs-to-hell.jpg"],
["stickers/guest/unfairizona-narrow-sticker.jpg"],
["stickers/guest/ebs-never-vote.jpg"]
  
 // Note: no comma after last entry
];

var number_of_image = image_list.length / 9;  // array size / number of groups (9 for this example)

function generate(range) {
  return Math.floor(Math.random() * range);
}
function getNextImage() {
  if (random_display) {
    image_index = generate(number_of_image);  // 0..number of images in group
  } else {
    image_index = (image_index+1) % number_of_image;
  }
  return image_index;
}
function rotateImage(place) {
  place = getNextImage();
  document.getElementById('Limage').src = image_list[place];
  document.getElementById('Mimage').src = image_list[place+4];  // number of items in group (4 for this)
  document.getElementById('Rimage').src = image_list[place+8];
  document.getElementById('Limage1').src = image_list[place+12];
  document.getElementById('Mimage1').src = image_list[place+16];
  document.getElementById('Rimage1').src = image_list[place+20];
  document.getElementById('Limage2').src = image_list[place+24];
  document.getElementById('Mimage2').src = image_list[place+28];
  document.getElementById('Rimage2').src = image_list[place+32];
  place++;
  var recur_call = "rotateImage("+place+")";
  setTimeout(recur_call, interval);
}