How Create 'To The Top Of Page' Link For Blogger

How to create to the Top of the page Button link for blogger,all websites and blogs have this to the top of page button at the bottom of there page.As it is very helpful for the sites and blogs which have long pages to scroll.So lets implement this top of the page link button just by adding small piece of codes to your blogger.Login to your Blogger go toDashboard > Layout > Page elements > Add a