Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:2/2
K:D
['dDD g fdad fadf', 'AdFd AdFA']  
X:1
L:1/8
M:2/2
K:D
 d |"D" ADF{E}D FADd |"G" GBFA"C" =cEEd |"D" ADF{E}D FAGB |"A" Adfe"D" dDD :| g |"D" fdad fadf | 
"C" g=cec"G" efgb |"D" fdad"A" ceA=c |"A7" BGBc"D" dDD || g |"D" fdad fadf |"C" g=cec"G" efga | 
"D" fd"A"ec"D" dA"G"BG |"D" AF"A7"GE"D" FDD |: B |"D" AdFd AdFA |"D" GBFA"C" =cEEG |"D" AdFd AdFA | 
"A7" GBEG"D" FDD :| d |"D" Adfd gefd |"D" Adfd"C" eg=ce |"D" dAfd gefd |"A7" ea{b}ag"D" fdd || f | 
"D" Adfd gefd |"D" Adfd"A7" efga |"D" fdBd"G" AdGd |"A7" FdEG"D" FDD |]  