mgn-conveyor

let conveyor = new mgnConveyor(".j-conveyor");

let btn = document.getElementById('btn');

btn.onclick = () => {
    conveyor.flag ? conveyor.Stop() : conveyor.Start();
}

<ul class="j-conveyor">
    <li><img src="images/img.jpg" alt=""></li>
    <li><img src="images/img3.jpg" alt=""></li>
    <li><img src="images/img2.jpg" alt=""></li>
</ul>

<button id="btn">stop / start</button>

.j-conveyor li { display: table-cell; }
.j-conveyor li img { height: 600px; width: auto; max-width: inherit; }
@media only screen and (max-width: 768px) {
	.j-conveyor li img { height: 450px; width: auto; }
}
@media only screen and (max-width: 640px) {
	.j-conveyor li img { height: 300px; width: auto; }
}

new mgnConveyor(
    ".j-conveyor2",
    {
        speed: 100
    }
);