main {
    height: 100vh;
}

/* Stickcy */
nav {
    position:sticky;
    background-color: aqua;
    top:10px;
}

/* Relative */
footer {
    position:relative;
    top: 100vh;
    left:2.5%;
}

/* Fixed */
#backToTop {
    position:fixed;
    bottom:0px;
    right: 0px;
}

/* Static */
#staticImg {
    /* optional pos declaration */
    position:static;
    height: 200vh;
    width:100vw;
}


/* Absolute */
#absoText {
    position: absolute;
    top: 50%;
    width: 100%;
    text-align: center;
    color:whitesmoke
}