How does the first passive on Lune's Kralim work?

[Carface Is My Spirit Animal]

Does it keep stacking as long as you're swapping elements? Or is it just a flat 20%?

[['w']]

Round->Chosen Ele->Fire B.----->Ice B.------>Earth B.---->Lightning B.
1---->Fire--------->0%---------->+20%-------->+20%-------->+20%
2---->Ice---------->+20%-------->0%---------->+40%-------->+40%
3---->Lightning---->+40%-------->+20%-------->+60%-------->0%
4---->Earth-------->+60%-------->+40%-------->0%---------->+20%
5---->Fire--------->0%---------->0%---------->0%---------->0% <- Reset (Fire reused)
6---->Fire--------->0%---------->+20%-------->+20%-------->+20%
7---->Ice---------->+20%-------->0%---------->+40%-------->+40%
8---->Ice---------->0%---------->0%---------->0%---------->0% <- Reset (Ice reused)
9---->Lightning---->0%---------->+20%-------->+20%-------->0%
10--->
Earth-------->+20%-------->+40%-------->0%---------->+20%
11--->Lightning---->+40%-------->+60%-------->+20%-------->0%
12--->Lightning---->0%---------->0%---------->0%---------->0% <- Reset (Lightning reused)



maybe... if light and dark doesn't count