How do u stop page content from moving down once u added a background image

Question

When i added a background image to my code it moves my heading and all the other things on my page to the button please is their any way I can make it not to affect my page content

Answer 1

/*CSS Code:*/
html{
width:100%;
height:100%

body {
width: 100%;
height: 100%;
background:url(someurl/image.png);
background-attachment:fixed;
background-size:100% 100%;
}

/*It's done*/

Answer 2

pls explain Space😴 (HibernatingForNextTwoYears 😴) Good Bye