Construct a musical arrangement using the specified alphabetical sequence and the given motif as a foundation.
X:1
L:1/8
M:4/4
K:G
['B (G/A/B/c/) dB gBdB gBdB a(AA.B) (G/A/B/c/', 'Tg>age abaf']  
X:1
L:1/8
M:4/4
K:G
 B | (G/A/B/c/) dB gBdB | gBdB a(AA.B) | (G/A/B/c/ dB) gBdB | c>ATd>c BGG :: f | Tg>age abaf | 
 g(ag)e beef | Tg>age abaf | gdec BGGf | (Tg>ag).e abaf (gag).e beef | Tg>age abaf | gdec BGG |]  