#b1
{
    height: 40px;
    width: 100%;
    background-color: rgb(42, 120, 165);
}
#b1:hover
{
    height: 100px;
    width: 100%;
    background-color: green;
    transition: 2s;

}
img
{
    height: 200px;
    width: 300px;
}
img:hover
{
    height: 200px;
    width: 300px;
    transform: rotate(180deg);
    filter:contrast(1000%)
    
}
li
{
    float: left;
    
}
li:hover
{
    
}