oneko-chat-bar.css

[class^="channelTextArea"]::before {
	content: "";
	width: 32px;
	height: 32px;
	bottom: calc(100% - 3px); /* Mess with the - 3px to change its vertical position */
	right: 10px; /* Switch this from right to left to put it on the left side, or increase/decrease to change its position */
	position: absolute;
	image-rendering: pixelated;
	background-image: url("https://raw.githubusercontent.com/adryd325/oneko.js/14bab15a755d0e35cd4ae19c931d96d306f99f42/oneko.gif");
	animation: oneko 1s infinite; /* change 1s to make the animation slower/faster */
}

@keyframes oneko {
	0%, 50% {
		background-position: -64px 0;
	}
	50.0001%, 100% {
		background-position: -64px -32px;
	}
}