Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:C
['ef/g/ de/d/']  
X:1
L:1/8
M:4/4
K:C
 de/f/ fe/f/ de/f/ e d | ef/g/ de/d/ c>ce>c | de/f/ fe/f/ de/f/ ed | ef/g/ de/d/ c>ce>g | 
 dB/G/ GG/G/ G>Ge>d | ef/g/ de/d/ c>ce>g | dB/G/ GG/G/ G>Ge>d | ef/g/ de/d/ c>ce>c ||  