s-orbital of H overlaps with sp-hybrid orbital of C to make a single sigma bond.
(note a triple bond. One on the mid is sigma while above and below are pi bonds.)
Another sp-hybrid orbital of C(on left) combines with sp-hybrid orbital of C(on right) and make a single sigma bond (in middle)
The bond above and below are the pi bonds and both are formed from the “Py” and “Pz” orbitals of both the C.
Another sp-hybrid orbital of C(on left) overlaps with sp2-hybrid orbital of carbon on right and forms a sigma bond.
Sp2 hybrid orbital of C overlaps with s-orbital of H to form sigma bond.
(NOte a double bond between C and O consisting of one sigma and one pi bond)
Sp2 hybrid orbital of C overlaps with sp2 hybrid orbital of O to form another sigma bond.
Pz orbital of C overlaps with Pz orbital of O to form a Pi bond.