Fill goes from top left to bottom right

Principle Version: Version 5.12 (5024)
macOS Version: Version 10.15.7
Description of what you need help with: Hello, how can I get the fill goes from top left to bottom right?

Steps to reproduce the behavior:

  1. Create two layers. One called bg and the other called color.
  2. Make both layers angle 45 degrees.
  3. Duplicate the artboard.
  4. Make the color layer fill with green color.
  5. Link the two artboards.
  6. Make Center X no animation.
  7. The fill goes from the center of the rectangle to both sides, which is not the animation that I’m looking for.

How can I get the fill goes from top left to bottom right? Thank you.

Screenshots/Sketch File/Principle file: (if applicable)