Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/8
M:4/4
K:C
['B c2 cB cdeg g a2 a', 'g2 ec acgc acec dcAc']  
X:1
L:1/8
M:4/4
K:C
|: B | c2 cB cdeg | g a2 a gede | fAAG cdce | agea gede | cEGc AdcA | CB,CA GEDE | 
 FA, (3A,A,A, B,G,GB | cfdB c3 :: e | g2 ec acgc | acec dcAc | Gc (3ccc ecgc | acge feee | 
 g2 ec acgc | acec dcAc | FA (3AAA BGBB | cedB c3 :|  