*{
    margin:0;
    padding:0;
    list-style:none;
}
body{
    width: 100%;
    height: 100%;
    background: #000;
}
span{
    width: 40px;
    height: 40px;
    background: url("../images/star.png");
    position: absolute;
    background-size:100%;
    animation: star 1s alternate infinite;
}
span:hover{
    transform:scale(1.5,1.5) rotate(180deg)!important;
    transition:all 1s;
}
@keyframes star {
    0%  {  opacity:0  }
    100%{  opacity:1  }
}