Construct harmonious tunes in line with the outlined letter symbolism and the presented thematic component.
X:1
L:1/16
M:2/4
K:G
['Bcde gage dedc BAGB ABAB cAFD', 'dcAB cdef gage gagf e[ce]2[ce]']  
X:1
L:1/16
M:2/4
K:G
 dc | Bcde gage | dedc BAGB |"D7" ABAB cAFD |"G" GABc d2dd | Bcde gage | dedc BAGB | 
"D7" ABAB cAFD |"G" [DA][GB]2[GB] [GB]2 :|[K:C] AB |"C" cdec dcAB | cdef gage | cdec dcBc | 
"G7" dcBA GGAB |"C" cdec dcAB | cdef gage |"F" fgaf"G7" gagf |"C" e[ce]2[ce] [ce]2 :|  