This spectacular text animation is by Mandy Michael, it uses Variable Font to create the effect of grass growing out of the text. Have a gardening or landscaping business this can be a fancy way to do things on your webpage.
If you are having trouble with the pen, try the archived copy on GitHub
Grass Text Effect Snippet
See the Pen Grassy Text with Variable fonts. by Mandy Michael (@mandymichael) on CodePen.0