.container{
    display: flex;
    width: 100%;
}

.one{
    background: url(backg/img1.jpg);
}
.two{
    background: url(backg/img2.jpg);
}
.three{
    background: url(backg/img3.jpg);
}
.four{
    background: url(backg/img4.jpg);
}
.section{
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    height: 95vh;
    cursor: pointer;
    flex: 0.4;
    margin: 8px;
    position: relative;
    transition: all 0.7s ease-out;
}
.section.active{
flex: 7;
}