How does the Pharaoh respond to Moses' request?

Pharaoh responded to Moses' request by saying no 9 times. Then when the 10th plague came and killed the Pharaoh 1st born son the Pharaoh called Moses' to his palace and told him to take the Israelites out of Egypt. Then realizing that he was losing his slaves the Pharaoh sends his army after Moses' and the Israelites. They were trapped before the Red Sea when God sent a fire cloud to protect the Israelites from the Egyptians. Then Moses' prayed to God and God answered by parting the Red Sea and the Israelites crossed on dry land. Then the fire cloud followed the Israelites allowing the Egyptians to follow after the Israelites. The last Israelite had finished crossing the Red Sea when the sea collapsed onto the Egyptian army and Pharaoh.