* {
    margin: 0;
    padding: 0;
    box-sizing:border-box;
}
body{
    text-align: center;
    padding-top: 30px;
}

#right-wheel,
#left-wheel {
animation: wheel 2s infinite linear;
transform-origin: center;
transform-box: fill-box;
}
#woman-bike {
animation: bike 1s ease-in-out infinite alternate;
transform-origin: bottom;
}

@keyframes wheel{
    from{
        transform: rotateZ(0deg);
    }
    to{
        transform: rotateZ(360deg);
    }
}

@keyframes bike{
    from{
transform: rotateX(0deg);
    }
    to{
transform: rotateX(15deg);
    }
}