Compose a piece of music that follows the specified structure and incorporates the given theme.
X:1
L:1/8
Q:1/8=60
M:4/4
K:G
['(3DEF G2 BG G2 FG Bcde =f2', '=f2 gf e2 d>c B2 G2'  
X:1
L:1/8
Q:1/8=60
M:4/4
K:G
"^slowly" (3DEF | G2 BG G2 FG | Bcde =f2 gd | e2 d>c B2 G2 | F6 (3DEF | G2 BG G2 FG | Bcde =f2 gf | 
 e2 d>c B2 G2 | G6 || de | =f>d (3cBA B>c (3def | g3 d =f2 gf | e2 d>c B2 G2 | F6 (3DEF | 
 G2 BG G2 FG | Bcde =f2 gf | e2 d>c B2 G2 | G4- G4 |]  