*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    
}

.bg{
    width: 100%;
    height: 100vh;
    transition: 4s;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: row;
}

.bg div{
    background-color: #89c4ff;
    
    
}
.b, .b1{
    width: 25%;
    height: 100%;

}
.b2{
    width: 50%;
    height: 100%;
}