Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/4
M:4/4
K:Amix
['A c e3/2 e/ f f', '[ca] [ca]/[ca]/ [ca] [cb] [ca]2 [cg]2']  
X:1
L:1/4
M:4/4
K:Amix
 A c e3/2 e/ | f f e B | B c d3/2 d/ | e e c A | A c e3/2 e/ | f f d B | d/ e e/ e/c/ B | 
 [EA] [EA]/[EA]/ [EA] e :| [ca] [ca]/[ca]/ [ca] [cb] | [ca]2 [cg]2 | [Bg] [Bg]/[Bg]/ [Bg] [Ba] | 
 [Bg] [Bf] [Be] c | [ca] [ca]/[ca]/ [ca] [cb] | [ca]2 [cg]2 | g/ e e/ d/c/ B | 
 [EA] [EA]/[EA]/ [EA] e :|  