Create a composition using the given motif and incorporating the alphabet-based structure.
X:1
L:1/8
Q:1/2=100
M:2/4
K:C
['B dBAF GGGB', 'F2 FD']  
X:1
L:1/8
Q:1/2=100
M:2/4
K:C
 C |[K:D]"^Wm Calvert" B | dBAF | GGGB | dBAF | E2 z B | dBAF | GGGB | AGFE | D2 z :: E | F2 FD | 
 GFGF | F2 FD | E2 z A | FFFD | GGGB | AGFE | D2 z :|  