<h3>Senegal</h3>

<div class="flag senegal"></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;
}

.senegal {
  background: linear-gradient(
    to right,
    #00863d 33%,
    #fdf041 33%,
    #fdf041 66%,
    #e3141e 0
  );
  display: grid;
  place-items: center;
}

.senegal::after {
  position: absolute;
  content: "";
  width: 72px;
  height: 72px;
  margin-top: 5px;
  background-color: #00863d;
  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.