How to Add Css Image Pulsating Code

New Member
1 0 1

1. I want to add an image and a css code that makes image pulsate. How do I add it? The shopify theme.css file is a little difficult.

2. Also I want to add a video background image with using an app that cause video to load slowly. I Uploaded the video and tried adding it to theme.css via the body class ".template-index {background-image: url("");
}" but its not loading. What am I doing wrong?

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