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:G
['fdec A2- AG EFGE', 'ABde f2 ge dfed']  
X:1
L:1/8
M:4/4
K:G
 de | fdec A2- AG | EFGE ABde | fdec A2- AG | EFGE D2 de | fdec A2- AG | EFGE ABde | f2 ed cAAG | 
 EFGE D2 :| FG | ABde f2 ge | dfed cAAG | G2- GA GE E2 | edcA GEFG | ABde f2 ge | dfed cA A2 | 
 f2- fa ge e2 | fage d2 :|  