Compose a piece of music using the provided motif and follow the designated alphabet character structure.
X:1
L:1/8
M:4/4
K:D
['AF F2', 'afdf eB B2 fgfe dfec dBAF']  
X:1
L:1/8
M:4/4
K:D
|: dB | AF F2 G2 FG | AF F2 EGFE | D2 FA dfec | dBAF E2 dB | AF F2 GFGB | AGFD EGFE | D2 FA dfec | 
 dBAF D2 :: de | f3 a gfgb | afdf eB B2 | fgfe dfec | dBAF E2 fg | af f2 bf f2 | afdf eB B2 | 
 fgfe dfec | dBAF D2 :|  