Animated Text JS seems to make problems

Hi there,

we want to animate a headline and use the code from this codepen: https://codepen.io/Attrexx/pen/jAjvJo
I added html, css and js via hook (to wp_footer).

Bizzarely it stops after the first animation.
I think i have made something wrong with the js – as I am not used to use JS.

Thanks for your help!
Best regards