how can i make a ad banner on top of my website in which the images switch every 3 seconds. please use images to show the instructions.

File Edit Search View Encoding Language Settings Tools Macroun Plugins Window ? index html chtmi lang-"en> ctitle Castro's restaurant creta charset- utc-8" cheader> ch1> Castro's ?style> hii restaurant-image src=' C/hl background : url ( text-align: center color: blue; background-repeat:none background-height:500px: 12 14 16 17 K/atyle 20 21 nav cbs ca href-index tul" Homec/a>enbsp ca href-"Menu.ht>Menuc/a> snbsp ca href-"Specials.htul>Specialscfa>snbsp fb> 23 24 25 26 27 28 29 30 31 body background "chairs-nenu-restaurant-6267.JRg-photos" nav width-400" height-"300" cp>This restaurant is a fanily buffet style the menu changes every year having different types of food of nany different cultures al1 put in one restaurant and our waiters can speak n 34 35 36 Hyper Text Markup Language file length: 1,292 lines: 40 Ln: 6 Col:8 Sel: 010 Windows (CR LF)UTF-8 INS O Type here to search 7:03 PM 5/6/2018