Construct a music composition that complies with the designated structure and theme.
X:1
L:1/8
M:4/4
K:G
['cBAG FGAB cBAB', 'G2 AB cBAA (3Bcd ef gagf gfef'  
X:1
L:1/8
M:4/4
K:G
 AB | cBAG FGAB | cBAB cdef | gagf gfec | dcAG ABAB | cBAG FGAB | cBAB c>def | gagf gfec | 
 dcAF G2 || AB | cBAA (3Bcd ef | gagf gfef | gagf geag | fedf e2 AB | cdcB cAdc | BAGA Bc d2 | 
 ef/g/af gfec | dcAF G2 ||  