Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/8
M:4/4
K:G
['GDEF G2 z2']  
X:1
L:1/8
M:4/4
K:G
|:"G" GABc de=fd |"C" g=fed e3 d |"D7" cBAG ABcA |1,3"G" GABc d^c d2 :|2,4"G" GDEF G2 z2 :: 
"G" (fg)gd (fg)gd |"D7" cBAc"G" B3 G | (fg)gd"D7" cBAc |"G" B3 G AGFG |"G" (fg)gd (fg)gd | 
"C" cBcd e3 d |"D7" cBAG ABcA |"G" GDEF G2 z2 ::"G" DGFG AGFG | AGFG B3 G |"D7" cBAG ABcA |1,3 
"G" GFGA Bc d2 :|2,4"G" GDEF G2 z2 :|"^G Coda" .G2 .D2 .G2 |]  