Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:2/4
K:Eb
['EG BBBB AGFG BFFF F2']  
X:1
L:1/8
M:2/4
K:Eb
 EG | BBBB | AGFG | BFFF | F2 EG | BBBB | AGFG | BFFF | F2 ec | BBAF | E2 EE | c2 cc | Bedc | 
 BBAF | E2 EG | B2 DD | E2 |]  