.fancy-border {
width: 150px;
height: 150px;
text-align:center;
border-top: 5px solid;
border-image: linear-gradient(to right, grey 25%, yellow 25%, yellow 50%,red 50%, red 75%, teal 75%) 5;
}body {
background: #ccc;
}
.box {
text-align: center;
position: relative;
line-height: 100px;
background: #fff;
height: 100px;
width: 300px;
}
.box:after {
background: linear-gradient(to right, #bcbcbc 25%,#ffcd02 25%, #ffcd02 50%, #e84f47 50%, #e84f47 75%, #65c1ac 75%);
position: absolute;
content: '';
height: 4px;
right: 0;
left: 0;
top: 0;
}.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;
}<div class="test"></div>