Form a musical composition by merging the given motif and the alphabetical representation of the specific sequence.
X:1
L:1/8
Q:1/4=150
M:4/4
K:C
['D3 ^F G_B A2 AG ^F2 _B2', '_B2 d3 c _B2 A2 G2 ^FG']  
X:1
L:1/8
Q:1/4=150
M:4/4
K:C
 D3 ^F G_B | A2 AG ^F2 | _B2 AB dc | A6 :: _B2 d3 c | _B2 A2 G2 | ^FG A_B AF | D3 E D2 | _B2 d3 c | 
 _B2 A2 G2 | ^FG A_B AF | G6 :|  