Create a musical composition adhering to the provided thematic and alphabetical guidelines.
X:1
L:1/8
M:6/8
K:C
['G cGE Cce dBG Gdf', 'e gec ceg afc cfa gec']  
X:1
L:1/8
M:6/8
K:C
 G | cGE Cce | dBG Gdf | edc gfe | e3 d2 G | cGE Cce | dBG Gdf | ege fdB | (d3 c) z :: e | 
 gec ceg | afc cfa | gec gec | e3 d2 e | gec ceg | afc cfa | gec GAB | (d3 c) z :|  