Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:4/4
K:D
['F G E C']  
X:1
L:1/8
M:4/4
K:D
 F | G E | C G/B | D E | F | G E | C G/BA/C | D A/E D | x2 D | A G | D/F A/E | D E | F | G E | 
 C G/BA/C | D A/E D | F | C G/B | D G/E | D E | F | G E | C G/BA/C | D A/E D |]  