Compose a musical piece in accordance with the outlined theme and structure.
X:1
L:1/8
M:2/2
K:G
['cBAG dGBd', 'gGG f fegd gfgd cBAG FADf gfgd'  
X:1
L:1/8
M:2/2
K:G
 d | cBAG dGBd | cBAG FADd | cBAG dGBd | eGfG gGG :| f | fegd gfgd | cBAG FADf | gfgd gfgd | 
 eGfG gGGf | gGfG eGdG | cBAG FADd | BGAB cdef | gfef gGG ||  