feat: improve heart beat animation

[iNorthIsle]

Summary

The repo is awesome, and the idea is COOL! But I have a little bit of OCD:

• The Heart-Beat looks lazy and not energetic 🤣
• The effect of text ( fade-in & fade-out ) exists some ghosts 👻

Change

Before	After

The gif loss of frame, U can check it in here

The animation style is optional & personal, it`s just a bit of advice or improvement.

Notice:

if you would like to have approval and merge the PR, U may pay attention to the data source and can help to test it, I can not trigger the Github action success through the input data with the correct format. so I modified this function, and it`s successful on the main branch, but I restore the modification in this PR, it should not break the CI.

[yihong0618]

Cool, I like your effect of beating.

[yihong0618]

Can you update the example to your new effect too?

[iNorthIsle]

Can you update the example to yours new effect too?
sure 🥳