What must I do to be saved?
The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel. (Mark 1:15)
You must believe on the Lord Jesus Christ that He shed His blood and died on the cross and rose from the dead three days later to wash away your sins and give you eternal life. You need to repent, Jesus said "except ye repent, ye shall all likewise perish" (Luke 13:5). And confess Jesus to be your Lord and you will be saved!
That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation. (Romans 10:9-10)
For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast. (Ephesians 2:8-9)
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. For God sent not his Son into the world to condemn the world; but that the world through him might be saved. He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. (John 3:16-18)
Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me. (John 14:6)
He that believeth on the Son hath everlasting life: and he that believeth not the Son shall not see life; but the wrath of God abideth on him. (John 3:36)