My element is not filling the entire space of the page

Question

So using the CSS code below I wanted to make my page fill entirely with an image located on my computer. Instead, it turned out like this:

#background {
    back         


        

Answer 1

Try this. Does it work

body {margin: 0;}

EDITED: For updated problem

#background {
    background: url(images/bg.jpg) no-repeat center center fixed;
    background-size: cover;
}