<h3>Liberia</h3>

<div class="flag liberia"></div>
* {
  box-sizing: border-box;
  margin: 0;
}

body {
  width: 100%;
  height: 100vh;
  background-color: rgb(221, 239, 255);
  display: grid;
  place-items: center;
  font-family: cursive;
  font-weight: bold;
}

h3 {
  position: absolute;
  text-align: center;
  top: 20px;
}

/* Main Style Stars from here  */
.flag {
  position: relative;
  width: 300px;
  height: 200px;
  box-shadow: 0 0 1px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}
.liberia {
  background: repeating-linear-gradient(
    #c0032d,
    #c0032d 18.18px,
    #fff 18.18px,
    #fff 36.36px
  );
}

.liberia::before {
  position: absolute;
  content: "";
  width: 91.2px;
  aspect-ratio: 1;
  background-color: #002367;
}
.liberia::after {
  position: absolute;
  content: "";
  height: 54px;
  aspect-ratio: 1;
  background-color: white;
  margin: 18px 20px;
  clip-path: polygon(
    50% 0%,
    61% 35%,
    98% 35%,
    68% 57%,
    79% 91%,
    50% 70%,
    21% 91%,
    32% 57%,
    2% 35%,
    39% 35%
  );
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.