Compose a musical piece in accordance with the outlined theme and structure.
X:1
L:1/8
Q:3/8=88
M:3/8
K:C
['A>AA _BAG']  
X:1
L:1/8
Q:3/8=88
M:3/8
K:C
 A>AA | _BAG | (c2 A-) | A2 z | d>dd | dc_B | (A2 G-) | G2 z | A>AA | _BAG | c2 A- | AGG | 
 (^F2 E) | DGG | G3- | G2 z ||  