Develop a musical composition based on the provided pattern of letters and incorporating the given motif within it.
X:1
L:1/8
M:4/4
K:D
['=cAGB ADDE FDAD FGAB =cAGB AGFG', 'efge dfed cA', 'fded =cAGc A3', 'e f2 ad faad faaf geeg fdAd']  
X:1
L:1/8
M:4/4
K:D
 =cAGB ADDE | FDAD FGAB | =cAGB AGFG | Adde fded | =cAGB ADDE | FDAD FGAB | =cAGB AGFG | 
 Addc d3 e || f2 df efge | dfed cA A2 | fedf edcd | Addc d2 cd | eaag efge | dfed cA G2 | 
 Addc d2 dc | Adde fded || =cAGc A3 d | B3 G A3 B | =cAGB AGFG | Adde fded | =cAGc A3 c | 
 BGGF G3 B | =cAGB AGFG | Addc d3 e || f2 ad faad | faaf geeg | fdAd faad | fage dcAc | 
 defg a2 ab | agfa g2 ag | fedf edcA | d3 e fded ||  