Preconditions: A Text block be inserted:

1. Select the created Text block
2. Click "Animate"
3. Click "Effect"
4. Click "Add Effect"
5. Click on "Opacity" (so that display the table of properties)
6. Click on "Text Color"
7. Click the white color block (so that display the text color table)
8. Select a color that you want
9. Click "Style" for backwards
10. Click "Add Keyframe"
11. Repeat and select a different color from the first color
12. Click "Preview" to view a preview of your animation