Gif problem

[Nico]

Hello everyone,

I have another question about gif so I'm going to use my own subject for it.

I would like put some gif on a png, in a specific location, not on the whole image. I have that png : https://zupimages.net/up/21/45/9fj3.png and I would like sparks over the word "firework". Like that image that I found on google image : https://zupimages.net/up/21/45/pp5k.gif
If you look at the word "firefly" you can see some "sparks" (at the end of the gif, you have to wait a little moment) and I would like the same effect.

I have that gif but I don't know how to use it. https://zupimages.net/up/21/45/w21q.gif

I can't remove the background so I don't know how to do this.

Thanks for your help !