*{
    margin: 0%;
    padding: 0;
    box-sizing: border-box;
}
.anim{
    position: relative;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    display: flex;
}
.paperplane{
    width: 100px;
    height: 100px;
    top: 50%;
    left: 0;
    position: absolute;

}
.anim{
    width: 100vw;
    height: 100vh;
    background-color:tomato;
    background-attachment: fixed;
}
header{
    width: 100vw;
    height: 100vh;
    background-color:deepskyblue;


}
.a {
    display: flex;
    justify-content: center;    align-items: center;

}