Repent to the sin and accept the blessing from the Lord

Leviticus 14:1-20
Cleansing from infectious skin diseases.
Two live birds and some cedar wood, scarlet yarn and hyssop be brought for the one to be cleansed.
On the eight day he must bring two male lambs and one ewe lamb a year old, along with three-tenths of an ephah of fine flour mixed with oil for a grain offering , and one log of oil. The priest who pronounces him clean.
The priest is to take some of the blood of the guilt offering and put it on the lobe of the right ear of the one to be cleansed, on the thumb of his right hand and on  on the big toe of his right foot.
The priest shall take some of the log of oil, pour it in the palm of his own left hand, dip his right forefinger into the oil in his palm, and with his finger sprinkle some of it before the Lord 7 times. The priest is to put some of the oil remaining in his pal on the lobe of the right ear of the one to be cleansed, on the thumb of his right hand and on the big toe of his right foot, on the top of the blood of the guilt offering. The rest of the oil in his pal the priest shall put on the head of the one to be cleanses.
Why?
We have a similar system of house inspection and treatment for dry rot today.
Cedarwoord contains a sustance used in medicine for skin diseases.
First blood then the oil means erase the sin and blessing to the one to be cleansed.
How?
Oil means Holy spirit, his mercy and grace pour down to us. It is the blessing from the Lord. Repent to the sin and accept the blessing through Jesus.