#randomchar { 
   
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    
    width: 200px;
    color: black;
    border-color: black;
    text-align: center;
    font-size: 40px;
    
}