Compose a musical piece in accordance with the outlined theme and structure.
X:1
L:1/8
M:2/4
K:G
['DGGG FA A2 BBcA AG']  
X:1
L:1/8
M:2/4
K:G
 DGGG | FA A2 | BBcA | AG G2 | dBBG | GE E2 | cBAG | FE D2 | DGGG | FA A2 | BBcA | AG G2 |]  