Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
Q:1/8=150
M:4/4
K:C
['GDBG DBGd Bgfe decA (3FAF DF Aced', 'GDBG DBGd Bgfe decA (3FAF DF Aced']  
X:1
L:1/8
Q:1/8=150
M:4/4
K:C
[M:2/2][K:G] gaue ae .ave eaaged ad a!p!ed facceb!p!!p! ue.BA | GDBG DBGd | Bgfe decA | 
 (3FAF DF Aced | cAFD ^cd=cA |"^5" GDBG DBGd | Bgfe decA | (3FAF DF Aced | cAEF G2 :| FG | 
"^9" BA^GA gA^GA | BA^GA fA^GA | BA^GA eA^GA | (3gfe dB A2 GA |"^13" BA^GA gA^GA | BA^GA fA^GA | 
 B/A/Bge ^cAGE | DCDE D2 EF |"^17" GDBG DBGd | Bgfe decA | (3FAF DF Aced | cAFD ^cd=cA | 
"^21" GDBG DBGd | Bgfe decA | (3FAF DF Aced | cAEF G4 |]  