Develop musical compositions by respecting the prescribed structure and combining the presented musical concept.
X:1
L:1/4
M:4/4
K:G
['D c']  
X:1
L:1/4
M:4/4
K:G
 D | G G G G/B/ | G D D D | c c/c/ B d/B/ | A z2 D | c c c/B/ A | B B B/A/ G | A A/A/ F E/F/ | 
 G B d D | c c c/B/A/G/ | B B B/A/ G | A A/A/ F E/F/ | G z2 |]  