ul {
	animation: slideshow 15s infinite alternate;
}
@keyframes slideshow {
    0%		{left:    0%;}
    10%		{left:    0%;}
    20%		{left: -100%;}
    30%		{left: -100%;}
    40%		{left: -200%;}
    50%		{left: -200%;}
    60%		{left: -300%;}
    70%		{left: -300%;}
    80%		{left: -400%;}
    90%		{left: -400%;}
    100%	{left: -400%;}
}