3*4 Animated Image Grid, How Can I Implement It?

https://www.youtube.com/watch?v=5ZWhnXZvdMM

I want to make an animation that flows like this. It's an animation that has the same new images and flows indefinitely! How can we make it?

At first, I made an image grid file with display: grid Grid is not animatable, so I don't think I can eat css animationㅠ<

I was thinking about doing a background-repeat, but it doesn't have a background image, so it's going to be hard..

I look forward to your feedback. Thank you in advance for your reply.