.transition{
    
    position: fixed;
    top:0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    z-index: 101;
    pointer-events: none;
}

.transition-row{
    flex:1;
    display: flex;
}

.transition-row.row-1 .block{
    transform-origin: top;
}

.transition-row.row-2 .block{
    transform-origin: bottom;
}

.block{
    flex:1;
    background-color: #0080ff;
    transition: scaleY(1); 
    will-change: transform;
}