Craft a musical composition that adheres to the specified musical theme and letter-based structure.
X:1
L:1/8
M:2/2
K:C
['|{f} e2 dc', 'fddf ecgc (B/c/d) BG ecce']  
X:1
L:1/8
M:2/2
K:C
 g |{f} e2 dc GBce | fdec fdec |{f} e2 dc GAcd | egde c/c/c c :| f | ecce fddf | ecgc (B/c/d) BG | 
 ecce fddf | ecdB Tc2 cf | ecce fddf | ecgc (B/c/d) BG | ecce fdgf | ecdB c2 c |]  