You have already a transitioning and a animation of heartbeat. do you like to change that one?
This is the code for the hover designs.
From your Shopify admin dashboard, click on “Online Store” and then “Themes”.
Find the theme that you want to edit and click on “Actions” and then “Edit code”.
In the “Assets” folder, click on “base.css, style.css or theme.css” file, depending on which file your theme uses to store its CSS styles. At the bottom of the file, add the following CSS code:
Go to your theme’s “Edit Code” Option, then in the search bar type “theme.liquid”
Below the tag “” tag paste the following. Screenshot attached for reference.
Screenshot is for reference only, the correct code to paste is the one shown above.