#ban {
  display:block;
  width: 70%;
  padding: 3px;
  border: 3px;
  border-style:solid;
  margin-left:auto;
  margin-right:auto;
}

.displaygrp{
  display:flex;
  justify-content:center;
  align-items:center;
  
}
body {
  background-color: white;
  color: black;
  font-family: Verdana;
}