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:Dmix
['FAce dA A2 dAcd BG', 'F4 a4 ageg a2 gb agec GAcd']  
X:1
L:1/8
M:4/4
K:Dmix
 FAce dA A2 | dAcd BG G2 | F2 ce dAcd | BGFG{D} E4 | FAce dA A2 | dAcd BG fg | a2 ab age^c | 
 d^cAG{E} F4 | FA=ce d3 A | dAcd B/A/G AG | F2 ce dAcd | BGFG{D} E4 | FAce dA A2 | dAcd BG fg | 
 a2 ab age^c | d^cAG F4 || a4 ageg | a2 gb agec | GAcd ecge | dcAF G2 fg | a3 b g3 a | f3 a g3 e | 
 f2 fd ef e^c | d^cAG{E} F4 | a4 ageg | a2 gb agec | GAcd ecge | dcAF G2 FE | DAcd BG G2 | 
 (3EFG AB{B} c4 | f3 d e2 ef | d=cAG F4 ||  