21: Guitar chord progression: E-key I-IV-V 7
Step1. Press the Emaj finger positions.
Step 2. Remove the first and second fingers.
Step 3. Press the 4th string 2 fret with the 1st finger.
Step 4. Remove the third finger.
Step 5. 2nd finger is 2 string 2 fret, 3 finger is 2 string 2 fret. (Amaj)
Step 2. Remove the 2nd finger and 3rd finger.
Step 7. With 1 finger pressed, it moves to 1 fret of the same string.
Step 5. Push the 2nd finger 5th string 2 fret, 3rd finger 3th string 2 fret, 4th finger 1st string 2 fret. (B7)