Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
M:2/4
K:C
['EG GA/B/ cc cd/e/ fd ed/c/', 'eg ge dc']  
X:1
L:1/8
M:2/4
K:C
 G/F/ | EG GA/B/ | cc cd/e/ | fd ed/c/ | AG GG/F/ | EG GA/B/ | cc cd/e/ | fd ed/c/ | AG G || | 
 (c/d/) | eg ge | dc Ac | eg ge | dc dc/d/ | eg ge | dc cd/e/ | fd ed/c/ | AG G ||  