Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/16
M:2/4
K:C
['G2 c2ec GcEG c2ec GEDC c2ec B2dB', 'G2 G2 G2cG eGFE F2BF dFED E2GE'  
X:1
L:1/16
M:2/4
K:C
 G2 | c2ec GcEG | c2ec GEDC | c2ec B2dB | AcBA G2 :: G2 | G2cG eGFE | F2BF dFED | E2GE cEDC | 
 G,2B,2 C2 :|  