style.css

*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
.banner {
    height: 100vh;
    width: 100vw;
    background: cadetblue;
    position: relative;
    background: linear-gradient(rgba(0, 0, 0, 0.600),rgba(0, 0, 0, 0.600)),url(./img/background.jpg);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}
.banner h1 {
    position: absolute;
    top: 40%;
    color: white;
    font-size: 50px;
}
.banner p {
    position: absolute;
    top: 60%;
    color: white;
    font-size: 30px;
}
.type{
    animation: border 400ms linear infinite;
}
@keyframes border {
    0%{
        border-right: none;
    }
    100%{
        border-right: 0.5px solid black;
        border-color: white;
    }
}
@media only screen and (min-width: 688px){
    .banner p {
        top: 55%;
    }
}