Speaking purely in terms of the CSS background property…
If you want your background not to repeat, add "no-repeat
".
If you want your background be positioned in the center, add "center center
".
If you want your background to scale to fit the available area, add "/ contain
"; if you want it to scale to fill the area, add "/ cover
". (If you're setting a scale, you have to include a position, followed by a slash, followed by the scale.)
e.g.