aside {display: flex;
    flex-direction: column;
    position: fixed;
    float: inline-start;
    width: 10%;
    height: 100%;
    text-align: center;
    left: 2%;
    align-content: center;
    z-index: 1;
    vertical-align: middle;
    z-index: 5;
    top:20%
}

aside:after {margin: 200px 10px;
    display: absolute;
    position: fixed;
    float: inline-start;
    width: 10%;
    height: 100%;
    text-align: center;
    left: 2%;
    align-content: center;
    z-index: 1;
}


.timeline {position: absolute;
    display:block;
    width:150px;
    margin:20px auto 0;
}



/* vertical line */

.timeline::before{content: '';
    position: absolute;
    left: 57%;
    top: 20%;
    width: 6px;
    height: 70%;
    margin-left: -50px;
    background: white;
}


.temp {position: relative;
    display: inline-block;
    align-content: center;
    padding: 10px 0;
    cursor:pointer;
}


/* Circles */

.temp::before { 
    content:"";
    padding:0;
    margin:0;
    width: 25px;
    height: 25px;
    background-color: white;
    border-radius: 50%;
    display: inline-block;
    vertical-align: middle;
}



.temp h2 {overflow:hidden;
    display:inline-block;
    text-indent:-500px;
    width:80px;
    text-decoration:none;
    text-transform:uppercase;
    padding: 10px;
    transition:0.2s ease;
    margin:2px 0 0 -7px;
}

.temp:hover h2 {color:#fff;
  text-align:center;
  text-indent:0;
}


.home{position: relative;
    display: block;
    top: -15px;
    left: 2%;
}