描述艺术创作过程的句型 — 英语阅读题

Read the passage and answer the question. Mia likes making art. Last Sunday, she made a picture. First, she drew a big sun on the paper. Then she painted the sun yellow and the sky blue. She used a small brush to paint the flowers red. After that, she folded the paper and made a card. Finally, she gave the card to her mum. Mum smiled and said, "What a nice card!" Question: What did Mia do first to make her picture? Answer in English (one short sentence).