Create a GIF with dimensions of 200px by 200px featuring an inverted triangle made out of the word 'abracadabra'. The GIF should have a white background and black letters. Each row of the triangle starts with the full word 'abracadabra' at the top, progressively removing the last letter for each row until only one letter remains. Ensure each row begins and ends with a space. The rows should appear one after another in an animated fashion.

create a gif width 200px and height 200px of an inverted triangle shape from the word abracadabra, the top row is the full word, the lower is the last letter less, continue rows till 1 letter is left, white background, black letters, appearing one after another,  each row begins with a space and finishes with a space

Q: What dimensions should the GIF have?
A: For example, width 200px and height 200px.

Q: What background color do you prefer for the GIF?
A: For example, transparent or white.