here’s what I need to do:

• get number of images (imgs.length)
• width of each image (here they are all the same width)
• create left and right links
• work out where we are currently
• if click left or right, go onto previous or next image
• create counter that shows which image i'm on
• create visual counter, e.g. blobs with current blob being different colour
• when click on blob, take you to that image
• still looks a bit borked!