Text which change color

Steps to take:

1. Go to https://pixlr.com/

2. Create new image

3. Settings 300 x 100

4. Check the box transparent

5. Give it a name

6. Add your text

7. Choose font/color

8. Save as png file 1

9. Click on the text - change color - save as png file 2

10. Repeat at least 10 times.

I repeated it 28 times

Choose for "Create gif animation"

Download the gif

You can choose your own animation speed