The following photos and information has been extracted from Coffret's Webpage:
A - Highlight Color
B - Free Medium Color - Blend these two colors to add color and shimmering light and create a
beautiful depth to your eyes.
C- Shadow Color
- Using a thick brush, apply the Highlight Color A from under the brow to cover the entire eyelid and brighten the eye area.
- Using a medium-sized brush, blend the two Free Medium Colors B and gently smudge from the outer eyelid to the inner eyelid area (adjust shine and coloration as desired).
*Using a thick tip will ensure complete coverage of the eyelid.
- Using a thin tip, apply the Shadow Color and draw a line along the upper lashes. Also apply a line halfway along the lower lashes from the outer eye.
Using the thin tip, apply Free Medium Color B-1 halfway along the lower lashes from the inner eyelid to further enhance color and depth of light
最後以細眼影棒沾取適量 B-1 打亮眼頭，提升眼睛的深邃明亮感
I got this quad last year when I've first started to apply shadows, and I think this is the quad for dummies. The combination of these shades will brighten your eyes while being fairly easy to use.
When I've first started with this quad I didn't really use the C shade on my lid, because I thought that darker shades were harder to control, but I would wet my brush and apply it as a liner, I actually only need this quad for my eye makeup.