Create a musical composition adhering to the provided thematic and alphabetical guidelines.
X:1
L:1/8
M:2/4
K:G
['GGAF GABc']  
X:1
L:1/8
M:2/4
K:G
 GGAF | GABc | .d.e B2 | .c.B A2 | GGAF | GABc | .d.G G2 | AG G2 ||  