Molecular Orbital Energy Levels Diagram

HCl is a simple heteronuclear diatomic molecule. The valence ao’s for this molecule are simply the H 1s and the 3s, 3px, 3py, 3pz ao’s of chlorine.
This following are the molecular orbital energy levels diagram of hydrogen chloride....

HCl has four pairs of valence electrons, yields the electronic configuration
(3s)2 (σ3px)2 (π3py)2 (π3pz)2 (σ3p*)
And shows three lone pairs (the 3s and pπn pairs) and one bond pair (from pσ)

I have been looking for the KF molecular orbital energy levels diagram, but I found HF ones. Here it is.........

I still lack of knowledge about MOT
I have’nt understood
Would you mind to give me an explanation....
Thankyou so much...

Cu in the next project for KF diagram

I'll do it as soon as possible....