The Bible teaches that there is one God, eternally existing in three Persons, Father, Son, and Holy Spirit. Various passages introduce us to the members of the Trinity and the relationships between them:

Go then, and make disciples of all the nations, giving them baptism in the name of the Father and of the Son and of the Holy Spirit:
Teaching them to keep all the rules which I have given you: and see, I am ever with you, even to the end of the world. Matthew 28:19-20

And Jesus, having been given baptism, straight away went up from the water; and, the heavens opening, he saw the Spirit of God coming down on him as a dove;
And a voice came out of heaven, saying, This is my dearly loved Son, with whom I am well pleased. Matthew 3:16-17

In times past the word of God came to our fathers through the prophets, in different parts and in different ways;
But now, at the end of these days, it has come to us through his Son, to whom he has given all things for a heritage, and through whom he made the order of the generations;
Who, being the outshining of his glory, the true image of his substance, supporting all things by the word of his power, having given himself as an offering making clean from sins, took his seat at the right hand of God in heaven;
Having become by so much better than the angels, as the name which is his heritage is more noble than theirs. Hebrews 1:1-3

The Bible declares God as the Creator of all things, and confirms the historicity of the entire narrative of Genesis, including God’s creation of the material universe in six literal days, a literal Adam and Eve as the parents of all mankind, a literal fall, and a universal flood.

In the beginning God created the heavens and the earth.
And the earth was waste and without form; and it was dark on the face of the deep: and the Spirit of God was moving on the face of the waters.
And God said, Let there be light: and there was light. Genesis 1:1-3

On six days do all your work:
But the seventh day is a Sabbath to the Lord your God; on that day you are to do no work, you or your son or your daughter, your man-servant or your woman-servant, your cattle or the man from a strange country who is living among you:
For in six days the Lord made heaven and earth, and the sea, and everything in them, and he took his rest on the seventh day: for this reason the Lord has given his blessing to the seventh day and made it holy. Exodus 20:9-11

For this reason, as through one man sin came into the world, and death because of sin, and so death came to all men, because all have done evil: Romans 5:12

... And did not have mercy on the world which then was, but only kept safe Noah, a preacher of righteousness, with seven others, when he let loose the waters over the world of the evil-doers... 2 Peter 2:5).

See Also:
The Bible: about God
God's Grace in the OT
The Case for A Creator
The Holiness of God