.logo {
    padding: 0px;
    width: 200px;
    height: 40px;
    background-image: url("http://ad.bitubi.eu/wp-content/uploads/2018/04/Fortinet_Logo_BlackRed_200px.png")
}

.logo:hover {
    padding-left: 200px;
  width: 200px;
    height: 40px;
    background-image: url("http://ad.bitubi.eu/wp-content/uploads/2018/04/Fortinet_Logo_BlackRed_200px.png")
}