.stretch_and_move{
    animation-name: stretch_and_move;
    animation-duration: .8s;
}
@keyframes stretch_and_move {
	from{
        width: 8em;
        left: 0em;
    }
    50%{
        width:18em;
        left:2.5em;
    }
    to{
        width: 8em;
        left: 11.5em;
    }
}
.stretch_and_move_backward{
    animation-name: stretch_and_move_backward;
    animation-duration: .8s;
}
@keyframes stretch_and_move_backward {
	from{
        width: 8em;
        right: 0em;
    }
    50%{
        width:16.5em;
        right:9em;
    }
    to{
        width: 8em;
        right: 11.4em;
    }
}