Exodus 7-9

Exodus 7
Moses is to be a God to Pharaoh and Aaron will be Moses's prophet.
Moses and Aaron go to speak to Pharaoh.
Moses throws his rod down and in turns into a serpent.
Pharaoh's magicians can do he same, although Moses's serpent eats up the other serpents.
The First Plague: River is turned to blood.
The magicians we able to do the same.

Exodus 8
The Second Plague: The Lord, through Moses says Let My people go or I will smite with frogs.
The frogs come and are everywhere so Pharaoh says they can leave.
The magicians are also able to summon frogs.
God only allows the frogs in the river, but Pharaoh hardens his heart again.
The Third Plague: Aaron made the dust of the earth lice on man and beast.
The magicians were not able to bring lice and told Pharaoh that this must be the finger of God.
Pharaoh still did not listen.
The Fourth Plague: Flies. Everywhere.
Pharaoh asks Moses to intercede for him.
Moses does so to stop the flies but Pharaoh still does not let the people go.

Exodus 9
The Fifth Plague: All Egyptian livestock are killed. None of the Israelite livestock died.
Pharaoh's heart was still hardened.
The Sixth Plague: Boils on everyone.
Pharaoh just never learns and still says no.
The Seventh Plague: Hail destroying everything that wasn't in the houses.
Goshen where the Israelites were was untouched by hail.
Pharaoh says the people can go if Moses stops the hail.
Moses does so and Pharaoh once again reneges.

Why are Pharaoh's magicians able to do some of the plagues that Moses and Aaron do? They are stopped by the lice in plague three.