Design a music composition that employs the provided motif and follows the predetermined musical form.
X:1
L:1/8
M:2/4
K:Amix
['A>B cd ec', 'e2 A>B cd ec (3efg a2 ge'  
X:1
L:1/8
M:2/4
K:Amix
 A>B cd | ec d2 | AB/c/ de | fg e2 | A>B cd | ec d>B | BA GB |1 A2 AF :|2 A2 A2 |: a2 ge | fd e2 | 
 A>B cd | ec (3efg | a2 ge | fd e>B | BA GB | A2 A2 :|  