var model:[URL] = [URL(string: "http://wallpapercave.com/wp/eH19xi9.jpg")!,
	                   URL(string: "https://k60.kn3.net/taringa/0/5/E/D/6/1/SapeyoTomesape/17E.jpg")!,
	                   URL(string: "http://wallpaperclicker.com/storage/wallpaper/country-road-wallpapers-full-hd-78111184.jpg")!,
	                   URL(string: "http://moheban-ahlebeit.com/images/Phone-Full-Hd-Wallpapers/Phone-Full-Hd-Wallpapers-1.jp")!,
	                   URL(string: "https://img.clipartfox.com/843a1f06f300206523258d841fa7b291_ultra-hd-wallpapers-8k-clipart-abstract-full-hd_3840-2160.jpeg")!,
	                   URL(string: "https://s-media-cache-ak0.pinimg.com/originals/01/1f/6a/011f6acdebaa983b6e468650dd28602e.jpg")!,
	                   URL(string: "http://hdwallpaper.info/wp-content/uploads/bfi_thumb/Desktop-Wallpaper-Hd-Full-Size-Download-Free-n2netqpa7sl4llmsvp1276a8lg3593hfscl8ls7ecg.jpg")!,
	                   URL(string: "https://i2.wp.com/viralini.com/wp-content/uploads/2014/10/longhorn_evolution_on_4k_preview__by_fiazi-d6wn4sb.jpg")!,
	                   URL(string: "http://www.startwallpapers.com/wp-content/uploads/2017/01/Nature-4K-Ultra-HD-Full-Wallpapers-Startwallpapers.com-241945.jpg")!,
	                   URL(string: "http://wallpapercave.com/wp/Eb8ctgL.jpg")!,
	                   URL(string: "https://img.clipartfox.com/26adc513c45c0e679b95a60a18270c28_-flame-wallpaper-1080p-full-hd-clipart-1080p-free-download_3651-2444.jpeg")!,
	                   URL(string: "http://www.shunvmall.com/data/out/21/47172956-batman-wallpaper-hd.png")!,
	                   URL(string: "http://k32.kn3.net/taringa/6/3/2/F/2/6/niad/425.png")!,
	                   URL(string: "https://onehdwallpaper.com/wp-content/uploads/2016/07/Full-HD-Snake-Wallpaper-For-Iphone-and-Laptop.jpeg")!,
	                   URL(string: "http://k46.kn3.net/taringa/8/D/A/3/8/F/WIk4N/9F1.jpg")!,
	                   URL(string: "https://img.clipartfox.com/80080160b56290b7bb5e58578a69e1a0_hot-air-balloon-wallpapers-hd-hd-full-clipart-hot_3840-2160.jpeg")!,
	                   URL(string: "http://orig13.deviantart.net/7bd3/f/2013/235/c/7/evolution_of_newton_s_cradle__4k_and_full_hd__by_dario999-d6jcm1u.jpg")!,
	                   URL(string: "https://k60.kn3.net/taringa/E/A/6/D/C/5/SapeyoTomesape/521.jpg")!,
	                   URL(string: "http://wallpapercave.com/wp/jAJYiba.jpg")!,
	                   URL(string: "http://orig09.deviantart.net/b63b/f/2013/314/4/d/minimalistic_diamonds___v2__4k_and_full_hd__by_dario999-d6tpkjw.jpg")!,
	                   URL(string: "https://4.bp.blogspot.com/-Iq7KCxFmtmA/UsUUB_pFV1I/AAAAAAAAcdE/NtLmjFTfP5M/s0/Full+Moon+Ultra+HD.jpg")!,
	                   URL(string: "https://k60.kn3.net/taringa/7/1/0/2/9/F/SapeyoTomesape/D2C.jpg")!,
	                   URL(string: "http://wallpaperxyz.com/wp-content/uploads/SuperCars-Wallpapers-Full-HD-Free-Download-Wallpaperxyz.com-30.jpg")!,
	                   URL(string: "https://s-media-cache-ak0.pinimg.com/originals/fe/1d/39/fe1d3914fbab15e7d28b2270b6d41ab6.jpg")!,
	                   URL(string: "http://k30.kn3.net/taringa/4/3/D/5/7/8/mAtyass322/18C.png")!,
	                   URL(string: "http://collidecenter.com/wp-content/uploads/2017/03/full-hd-wallpapers-high-quality-50.jpg")!,
	                   URL(string: "http://k15.kn3.net/taringa/5/7/0/0/5/1/1/alejores/F1A.jpg?330")!,
	                   URL(string: "https://k46.kn3.net/taringa/D/E/9/4/3/C/MexicanoYT/770.jpg")!,
	                   URL(string: "http://science-all.com/images/wallpaper-full-hd/wallpaper-full-hd-29.jpg")!,
	                   URL(string: "http://gamingbolt.com/wp-content/uploads/2011/03/Crysis-2-Wallpaper-Full-HD-1080P-PC.jpg")!,
	                   URL(string: "http://wallpaperclicker.com/storage/wallpaper/Full-HD-p-Wallpapers-82327968.jpg")!,
	                   URL(string: "http://orig10.deviantart.net/7545/f/2012/070/d/6/android_wallpaper_by_augdaug-d4sfrq8.jpg")!,
	                   URL(string: "http://k37.kn3.net/taringa/1/9/1/7/3/4/73/rpttpr/FA0.jpg?8595")!,
	                   URL(string: "https://i.ytimg.com/vi/HB1xGWDwhiA/maxresdefault.jpg")!,
	                   URL(string: "https://s-media-cache-ak0.pinimg.com/originals/59/2c/0e/592c0ece55c2b84a73aee9e0ea80639e.jpg")!,
	                   URL(string: "http://2.bp.blogspot.com/-HrJGFPRU1pc/UT6baqXxp-I/AAAAAAAA7ZE/n7BEUvPsu1w/s1600/bora-bora-11882-1920x1080.jpg")!,
	                   URL(string: "http://3.bp.blogspot.com/_dx_nO4X3Yxs/S8n8B0DcYlI/AAAAAAAAAB8/UXlUnfraSaY/s1600/eioad0.jpg")!]