Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
Q:1/4=80
M:3/4
K:C
['D GF', 'cB A3']  
X:1
L:1/8
Q:1/4=80
M:3/4
K:C
"^(Editorial suggestion)" D | GF G2 AG | =FE D3 D | GF G3 D | cB A3 D |"^(a)" Bc d3 B | cB A3 F | 
 GE C2 DD | EE D3 ||"^(   )" D | GF G2 AG | =FE D3 D | GF G3 D | cB A3 D |"^(a) var." cc d3 B | 
 cB A3 F | GE C2 DD | EE D3 |]  