Develop musical pieces adhering to the outlined composition guidelines.
'Ternary', 'Sectional: Verse/Chorus/Bridge'  
X:1
L:1/8
M:6/8
K:D
 (3ABc |: d2 D DEF | GBG ABc | dfa gfe | ded cBA | d2 D DEF | GBG ABc | dfa gec |1 ABc d2 (3ABc :|2 
 ABc d2 =c |:[K:G] BdB GAB | cec ABc | BdB GAB | ABG FED | BdB GAB | cec ABc | BdB cAF |1 
 DEF G2 A :|2 DEF G2 ||  