Verses 1-6: The Idolatry Initiated. The people grow restless waiting for Moses and pressure Aaron to create gods, resulting in the golden calf and a feast to the LORD that quickly devolves into pagan revelry.
Verses 7-14: God's Anger and Moses' Intercession. God informs Moses of Israel's corruption and threatens judgment, but Moses appeals to God's promises and reputation, persuading Him to relent.
Verses 15-20: Moses Confronts the Sin. Moses descends, hears the celebration, sees the calf and dancing, breaks the tablets, destroys the idol, and forces the people to drink the powdered remains.
Verses 21-29: Aaron’s Explanation and the Levites’ Judgment. Aaron attempts to excuse his actions; Moses calls for those loyal to the LORD to rally, leading to the Levites executing about three thousand men.
Verses 30-35: Moses’ Atonement and God's Judgment. Moses seeks to atone for the people's sin; God declares judgment will come but promises His angel will lead them, and He sends a plague as punishment.