Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:4/4
K:G
['GBAF GABc dfec dcBA BEED EFGA BdAF', 'Beef e2 ef gfef gedc']  
X:1
L:1/8
M:4/4
K:G
 GBAF GABc | dfec dcBA | BEED EFGA | BdAF GFEF | GBAF GABc | dfec dcBA | BEED EFGA | BdAF G2 GA || 
 Beef e2 ef | gfef gedc | Bcde d2 dc | Bcde dcBA | Beef e2 ef | gfef gedc | BEED EFGA | 
 BdAF G2 GF ||  