<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>

:root {
  --dark: #263e4a;
  --light: #5c95b1;
}

body {
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  margin: 0;
  background: var(--dark);
}

div {
  width: 100vw;
  height: 10vh;
  background: repeating-linear-gradient(
    90deg,
    var(--dark) 5%,
    var(--light) 5%,
    var(--light) 10%,
    var(--dark) 10%,
    var(--dark) 15%,
    var(--light) 15%,
    var(--light) 20%,
    var(--dark) 20%,
    var(--dark) 25%,
    var(--light) 25%
  );
  border-top: 2px solid var(--dark);
  border-bottom: 2px solid var(--dark);
  position: relative;
  margin-left: 1%;
  box-sizing: border-box;
}

div:nth-child(2),
div:nth-child(6),
div:nth-child(10),
div:nth-child(4),
div:nth-child(8) {
  margin-left: 2.5%;
}

div:nth-child(3),
div:nth-child(7) {
  margin-left: 4%;
}

div:before {
  content: "";
  background: var(--light);
  position: absolute;
  left: -5%;
  width: 5%;
  height: 100%;
}