url('paper.gif')|url('img_tree.gif'), url('paper.gif')|conic-gradient(red, yellow, green)|linear-gradient(red, yellow, blue)|radial-gradient(red, green, blue)|repeating-conic-gradient(red 10%, yellow 20%)|repeating-linear-gradient(red, yellow 10%, green 20%)|repeating-radial-gradient(red, yellow 10%, green 15%)
This demo shows some different techiques on how to set a background image of a HTML element.