Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:3/4
K:G
['B>A GBddBG FAddcA FAddcA GBddB>A GBddBG FAddc>A']  
X:1
L:1/8
M:3/4
K:G
 B>A | GBddBG | FAddcA | FAddcA | GBddB>A | GBddBG | FAddc>A | FAddc>A | G2 z2 |]  