body {
      font-family: Arial, sans-serif;
      background-color: #f4f4f4;
      background-image: url(BG.png);
  }

  .calculator {
      width: 300px;
      margin: 50px auto;
      background: #fff;
      border-radius: 5px;
      padding: 20px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
      display: grid;
      grid-gap: 10px;
  }

  .calculator input[type="text"] {
      padding: 10px;
      border: 1px solid #ccc;
      border-radius: 5px;
      font-size: 18px;
  }

  .calculator #input {
      grid-row: 1;
  }

  .calculator #output {
      grid-row: 2;
  }

  .calculator .buttons {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      grid-gap: 5px;
  }

  .calculator button {
      width: 100%;
      padding: 10px;
      border: none;
      border-radius: 5px;
      font-size: 18px;
      cursor: pointer;
      background: #4CAF50;
      color: #fff;
  }

  .calculator button.clear {
      grid-column: span 2;
      background: #f44336;
  }

  .circle {
      width: 50px;
      height: 50px;
      background-color: blue;
      border-radius: 50%;
      animation: mycircle 3s infinite alternate;
  }

  .box {
      width: 50px;
      height: 50px;
      background-color: blue;
      animation: mybox 3s infinite alternate;
  }

  @keyframes mybox {
      0% {
          transform: translateX(0);
      }

      100% {
          transform: translateX(75em);
      }
  }

  @keyframes mycircle {
      0% {
          transform: translateX(75em);
      }

      100% {
          transform: translateX(0);
      }
  }