CSS - Background image gradient

background-image: -webkit-gradient(linear, 0 0, 100% 100% ,
 color-stop(0.25, red),
 color-stop(0.25, yellow),
 color-stop(0.5, yellow),
 color-stop(0.5, red),
 color-stop(0.75, red),
 color-stop(0.75, yellow),
 to(yellow));