body {
  background-color: black;
  font-family: "Courier New";
  overflow: hidden; /* Hide scrollbars */


}

.all {
  height:100vh;
  width:100vw;

}

.center {

  height: 20vh;
  width:20vw;
  position: fixed;
  top: 50%;
  left: 50%;
  margin-top: -10vh;
  margin-left: -10vw;
  /*border: 3px solid white;

   */
  color:white;
}