Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:2/4
K:F
['G>BBA A>GGF FdcB AG']  
X:1
L:1/8
M:2/4
K:F
 FAcc | ccAF | d>cBA | Gc c2 | G>BBA | A>GGF | FdcB | AG F2 | G>BBA | A>GGF | FdcB | AG F2 |]  