Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:4/4
K:G
['d3 B degg e2 dB d3 d']  
X:1
L:1/8
M:4/4
K:G
|:"B7" B,4"D" D4 |"Em" E3 E EEGE | (DE) E/E/E GABd | (de) e/e/e"D/F#" edBA |"G" B3 B B2 BB | 
"D/F#" d3 B degg | e2 dB d3 d |"Am" egge ggag |1 b2 ag"B7" ab z2 :|2"Am" b2 ag"B7" aga"Em"b- |: 
"^(Em)" b2 ag a g2"C#m" ^g- | g2 fe fee"C"=g- | g2 =fe f e2 e- | eedB dBAB |"D/F#" d3 B degg | 
 e2 dB d3 d |"Am" egge ggag |1 b2 ag"B7" aga(b :|2"Am" b2) ag"B7" ab z2 ||  