How do you make a pacific region of a picture blink?

Question

i want to make a picture like this: http://media.photobucket.com/image/blinking myspace/axloverxandxloved/myspace pics/blinking-1.gif?o=4. i went to lunapic.com and went to the color cycle animation. but it makes the whole picture blink. i only want one part blinking. i do have gimp but when i tried it, it doesn't look as real as lunapic. how do i do this?

Answer 1

Perhaps you should post this in an artistic or computer art section. This is the home theater section and we don't have many artists here.