li:nth-child(2n){
background-color:grey;
list-style-type:none;
padding-left:5px;
margin-right: 70%;
margin-bottom: 5px;
}

li:nth-child(2n+1){
    background-color:rgb(191, 191, 191);
    font-style:italic;
    list-style-type:none;
    padding-left:5px;
    margin-right: 70%;
    margin-bottom: 5px;
}