Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
M:2/2
K:D
['d2 (df) e2 (eg)', 'abaf dfaf'  
X:1
L:1/8
M:2/2
K:D
 A | d2 (df) e2 (eg) | fdgf e(EE)e | d2 (df) e2 (eg) | fdec dDDA | d2 (df) e2 (eg) | fdgf e(EE)e | 
 defd efga | fdec dDD || f | abaf dfaf | gbaf g(ee)f | abaf dfaf | ge a/g/f/e/ fddf | abaf dfaf | 
 gbaf g(ee)f | dfeg fagb | afge fdd |]  