15: Guitar chord progression: D-key I-IV-V
Step1. Press the D Maj finger positions.
Step 2. Remove 1st finger and press 5th string 2 fret with 1st finger.
Step 3. Remove 2nd finger and 3rd finger.
Step 4. Push the 6th string 3 frets for 2nd finger and 1st string 3 fret 4th finger. (G Maj)
Step 5. Remove 1st finger and press 4th string 2 fret with 1st finger.
Step 6. Remove 2nd finger and press 3rd string 2 fret with 2nd finger.
Step 7. Remove 4th finger and press 2nd string 2 fret with 3rd finger. (A Maj)