h4 {
        background-color: black;
        color: yellow;
        font-family: impact;
  }
  
  
      
  body {
        background-color: black;
        margin: 0;
        color: yellow;
         font-family: impact;
      }
      
.box {
  width: 350px;
  height: 20px;
  margin: 0;
}