Explain the difference between incomplete dominance and codominance

Think of it like this

Incomplete dominance is like this

if RR and rr are for skin color of Red (RR), and white (rr) Incomplete would be like

Rr=pink, and not Domiance where Rr would be heterozygous Red.

Codominance is like in zebra's, where there is black AND white stripes, they are both expressed fully, but not in the same place.