or: #228b22; /* Green */
        border-radius: 50%;
      }
      .rock {
        background-color: #a9a9a9;
      }

      .pen {
        position: absolute;
        width: 100px;
        height: 100px;
        border: 3px dashed #fff;
        box-sizing: border-box;
      }
      #timer {
        position: absolute;
        top: 10px;
        right: 10px;
        font-size: 24px;
        color: white;
      }

      #score {
        position: absolute;
        top: 10px;
        left: 10px;
        font-