Exodus 7-9

Moses and Aaron talk to Pharaoh to persuade him to let the Israelites out of the country. God tells them to perform miracles.

The next several events are very repetitive:

Aaron threw down his staff in front of the Pharaoh and it transformed into a snake. But then the Pharaoh called on his magicians who were also able to do it with their secret arts, so the Pharaoh's heart was hard and did not listen to them.

Then Moses and Aaron went and met the Pharaoh by the Nile. He asks him to let his people go, and struck down the Nile river and turned it into blood. The fish in the river died and became undrinkable. However, the magicians were also able it to do this with their secret arts.

Moses asked again to let his people go, and Aaron stretched his hand out to cover the land with frogs. The magicians were also able to do this with their secret arts. The Pharaoh said that if Moses took away the frogs, then he'd let them go, but just as the frogs all died, his heart hardened and would not let the people go.

Same thing happens with gnats, flies, livestock, boils, and hail.