Compose a piece of music following the specified structure and theme.
X:1
L:1/16
M:2/4
K:Bb
['G D3 G G3 A']  
X:1
L:1/16
M:2/4
K:Bb
 G | D3 G G3 A | B2A2 B3 G | F4 F4 | F4 F3 G | D3 G G3 A | B3 A B2c2 | d4 (d3 c) | d6 d2 | 
 d3 c B3 c | d3 e f2d2 | c3 B A2G2 | AB cA B3 c | d4 (c3 B) | B3 G d2D2 | (D G3) B2A2 | G6- G ||  