people can always do like I did with some images: adapt some from here to be 3200x480 (better if 360° and loopable) and split it in 4 parts..
(!: watch out for legal stuff)

ms paint had a main role in this, lol; just don't try to save jpegs with it for high quality save as png and convert with something else. I have to admit that my pc (a poor macmini) had some trouble handling some 70 MBs pngs...