.footer .copyright:after {
  content: "";
  display: block;
  background-image: url(https://i.ibb.co/Mkt7ZP1/25654-2-major-credit-card-logo-transparent.png);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center center;
  height: 40px;
  margin-top: 10px;
}