Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/16
Q:1/8=150
M:2/4
K:C
['efed cGce gfef d4 GABc d2de |1', 'A2Bc dcBA G4 GABc d2de |1 f2ed']  
X:1
L:1/16
Q:1/8=150
M:2/4
K:C
 efed cGce | gfef d4 | GABc d2de |1 f2ed e2c2 :|2 f2ed c2 z2 :: e2g2 | A2Bc | dcBA G4 | 
 GABc d2de |1 f2ed e2c2 :|2 f2ed c4 ||  