Develop a musical composition using the provided structural guidelines.
'Ternary', 'Sectional: Verse/Chorus/Bridge'  
X:1
L:1/8
M:4/4
K:D
 g |: fA d2 dA d2 | fA d2 faga | fA d2 dA d2 | eA c2 egfg | fA d2 dA d2 | fA d2 faga | 
 fA d2 AA d2 | eA c2 egfg :: fdad fgaf | fdad faga | fdad fdad | ecgc egfg | fdad fgaf | 
 fdad faga | afge fdaf | ecg x efga :|  