Develop an original musical piece that integrates the given alphabet sequence and motif.
X:1
L:1/4
Q:1/4=90
M:3/4
K:D
['F G A A2 A', 'D E']  
X:1
L:1/4
Q:1/4=90
M:3/4
K:D
 F G A | A2 A | F G A | A2 A | B A G | F2 E | D E D | F2 D :: E C D | E C D | E C D | E F G | 
 A G F | F2 E | D E D | F2 D :|  