styles.css

*{
    margin: 0;
    padding: 0;
    border-style: border-box;
    font-family: 'Open Sans', sans-serif;
}
body{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background:url(modal-background.png);
}
p{
    text-transform: uppercase;
}
h3{
    color: #fff;
    position: absolute;
    top:30%;
    right: 10%;
}
button{
    position: absolute;
    top:45%;
    right:15%;
}
.square{
    position: relative;
    width: 400px;
    height:400px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.square span:nth-child(1)
{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
   border: 2px solid #fff;
   border-radius: 38% 62% 63% 37% / 41% 44% 56% 59%;
   transition: 0.5s;
   animation: animate 6s linear infinite;
}

.square:hover span:nth-child(1){
    border: none;
    background: rgba(0,0,255,0.8);
}

.square span:nth-child(2)
{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
   border: 2px solid #fff;
   border-radius: 38% 62% 63% 37% / 41% 44% 56% 59%;
   transition: 0.5s;
   animation: animate 4s linear infinite;
}

.square:hover span:nth-child(2){
    border: none;
    background: rgba(0,0,255,0.8);
}

.square span:nth-child(3)
{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
   border: 2px solid #fff;
   border-radius: 38% 62% 63% 37% / 41% 44% 56% 59%;
   transition: 0.5s;
   animation: animate2 10s linear infinite;
}

.square:hover span:nth-child(3){
    border: none;
    background: rgba(0,0,255,0.8);
}

@keyframes animate{
    0%{
        transform: rotate(0deg);
    }
    100%{
        transform: rotate(360deg);
    }
}
@keyframes animate2{
    0%{
        transform: rotate(360deg);
    }
    100%{
        transform: rotate(0deg);
    }
}


.content{
    position: relative;
    padding: 40px 60px;
    color: #fff;
    text-align: center;
    transition: 0.5s;
    z-index: 1000;
}
.content a{
    position: relative;
    display: inline-block;
    margin-top: 10px;
    border: 2px solid #fff;
    padding: 6px 18px;
    text-decoration: none;
    color: #fff;
    border-radius: 73% 27% 44% 56% / 49% 44% 56% 51%;
}
.content a:hover{
    background: #fff;
    color: #333;
}