21 : ±âŸ·¼·¹ ÁÖÈÀ½ ÈÀ½ÁøÇà : A-key 1µµ-4µµ-5µµ7
Step 1. Amaj¸¦ ¤´Â´Ù.
Step 2. 1Áö, 2Áö¸¦ ¶¾´Ù.
Step 3. 1Áö¸¦ 4Çö 2ÇÁ·¿À» ¤´Â´Ù.
Step 4. 3Áö¸¦ ¶¾´Ù.
Step 5. 2Áö¸¦ 3Çö 2ÇÁ·¿, 3Áö¸¦ 2Çö 2ÇÁ·¿À» ¤´Â´Ù.(Dmaj)
Step 6. 2Áö, 3Áö¸¦ ¶¾´Ù.
Step 7. 1Áö¸¦ ¤ÀºÃ¤·Î 1ÇÁ·¿À¸·Î À̵¿ÇÑ´Ù.
Step 8. 2Áö¸¦ 5Çö 2ÇÁ·¿, 3Áö¸¦ 3Çö 2ÇÁ·¿, 4Áö¸¦ 1Çö 2ÇÁ·¿À» ¤´Â´Ù.(E7)