All babies that were born to Israelite mothers were demanded to be killed. As the Pharaoh thought they could possibly over throw him. But one day the Pharaoh's daughter found baby Moses beside the Nile River.
Exodus 2:6 “This must be one of the Hebrews’ children”
Moses thought of a few ways to everyone that this was God. Some of these included turning the Nile River into blood, sending flies to the castle and he unleashed a storm in Egypt. But even after all of this the Pharaoh still didn't do anything.
Once Moses had grown up he witnessed an Egyptian being beat by an Israelite.
What on earth is he doing!
Moses then killed the Israelite but realised someone had reported it. Moses then ran away and kept walking for many more days. While he was on his journey he saw a burning burning and knew it was God.
Exodus 3:3 “I must turn aside and look at this great sight, and see why the bush is not burned up.”
Exodus 3:5 “Come no closer! Remove the sandals from your feet, for the place on which you are standing is holy ground.”
After 40 years Moses came back to Egypt. When Moses threw his items on the ground it turned snake as a sign of God. So he travelled to the Pharaoh to tell him what God's wish is.
Let the people go into the wilderness to worship and offer sacrifices to God.
Then the final plague was announced, all first born Egyptians were to die. God explained to Moses and Aaron that they must place lamb blood on their front door, so they did so. Exodus 12:30 The Pharaoh arose in the night, he and all his officials and all the Egyptians; and there was a loud cry in Egypt, for there was not a house without someone dead.