html, body {
    margin: 0;
    padding: 0;
    
}

:root {
    --bg-word: #5134ff;
}

.container {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 15%
}

h1 {
  font-family: Arial, sans-serif;
  font-size: 2em;
  color: black;
  position: relative;
  margin-left: 5px;
}

h1::after {
  content: "";
  animation: carousel 4s infinite;
  background: var(--bg-word);
  color: white;
  border-radius: 2px;
  padding: 10px
}

@keyframes carousel {
  0% {
    content: "Scrimba";
  }
  25% {
      content: "Scrimba's";
  }
  50% {
    content: "JavaScriptmas"; 
  }
  75% {
      content: "challenge"; 
  }
  100% {
    content: "Scrimba";
  }
}