If you are Gimp users you should know the Sparks brush.it is the yellow brush at the bottom of the brush window of your program.
I really like when I use it but it gives only one color.here you can learn how to use this brush so you can have and other colors.

1.Open a new document and fill it with black color.we are going to use it as the background.
2.Go to the layers window create a new layer in transparency and add it to the image.name it green.
3.Go to tools choose green color then the bucket tool and fill the top layer.
4.Set the green layer to opacity overlay mode and select the background layer.
5.Choose the Sparks brush tool and paint to the bottom layer.you will get green sparkles!

You can use any color you like for the overladed layer.you can use different colors from other brushes or you can fill it with a gradient to have the result you want.

Good luck!

This works very well by setting the blend mode to Hue.

Yes it works better if you want the exactly color.overlay give other dimension to a color.you can get various of color results.
Everybody can play with the blending modes it is free.

Wow! Do I LOVE this cool trick! Any color, any colored brush. Works great. I left my painting layer transparent.

Great tip!!

Neat trick hue or color mode work equally well. =)
Throw a gradient (abstract 2) on the color layer once...pretty cool.
Thanks!

Wow, that's very pretty Toni! Nice. How about telling how you did it?

seems i am the only one that didn't understand 4
what means "Set the green layer to opacity mode" ?

I think that's a typo - I think it should say overlay. Setting the layer mode to different ones gives different effects and colors.

yeah i figured it was overlay too, but you can use any mode you like. =)

Yes, sure O, if I can remember, lol.
layer 1...Black background, layer 2...large blocky text. Layer 3...I used one of the rainbow gradients in spiral pattern, and I think I ticked the bottom repeat option but don't know if it made any difference.
Then I went to the text layer and alpha to selection, went to the background layer and painted around with the sparks brush. I deleted the text layer, but kept the lettering selection on. Last I stroked selection with 1 pixel. I forget if I used the gradient or just picked one of the colors to stroke. This is a very versatile tutorial, Alek, so many ways to change it up! Thanks.

Oregonian was right.so you! it was a type error.I am really very sorry for that.
I wanted to wrote to 4.OVERLAY

Thank you all of you guys,you are great!

Thanks Toni. I'll have to give it a try.

GIMP just has so many possibilities.I don't think i will ever (or possibly anyone will), learn all there is to know with this wonderful program. =)

VIVA LA GIMP!

and even if you did learn everything, someone would script something new, lol. gotta love open source.

Meesa liking dees too. Many possibilities

Another cool text effect.

Here's another way to paint with sparks; it avoids having any yellow in the effect (unless, of course, you want yellow:)
1. Create a new image with transparent background
2. Go to the layers window and change the layer's name from "background" to "sparks"
3. Select the brush tool and sparks brush, and use it to paint whatever pattern you want onto the layer
4. Go to the image window menu and select Colors/Desaturate (select lightness or luminosity for slightly different effects)
5. Go to the layers window and create a new layer. Name it "color" and use the bucket tool to fill it with the color you want the sparks to be.
6. In the layers window, select the "color" layer, right-click it, and add layer mask-- choose Black (full transparency).
7. In the layers window, select the "sparks" layer
8. From the image window menu, select/all then edit/copy
9. In the layers window, select the "color" layer, then from the image window menu, edit/paste
10. Anchor the floating layer and apply layer mask

This gives you sparkles of the exact color you want on a transparent background. It's a longer procedure, but it seems to give a more pure color.

nice tute, welcome to Gimp Chat PoorDave.