📅  最后修改于: 2022-03-11 14:47:32.900000             🧑  作者: Mango
.test {
width: 500px;
height: 100px;
background-color: #ccc;
position: relative;
}
.test:before,
.test:after {
content: "";
position: absolute;
left: 0px;
right: 0px;
height: 10px;
background-image: -webkit-linear-gradient(0deg, red 20px, blue 20px, blue 40px, yellow 40px, yellow 60px, green 60px, green 80px);
background-image: -ms-linear-gradient(0deg, red 20px, blue 20px, blue 40px, yellow 40px, yellow 60px, green 60px, green 80px);
background-size: 80px;
}
.test:before {
top: 0px;
}
.test:after {
bottom: 0px;
}