helloooo

hiii, so i recently made a post on reddit about this but im still a bit unlucky, im trying to make a custom background, please can somone tell me if this is the correct coding and if it isnt can u please tell me the correct things? <3

<style>

main{ 

 background: url("https://i.pinimg.com/736x/7d/34/31/7d3431ba8acee291d13aac1e778b6498.jpg")

 background-repeat: no-repeat;

 background-size: cover;

 background-attachment: fixed;

 }</style>