Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
M:2/2
K:Amix
['eAAc e2 ef gafd edBA', 'g3 a', 'ef gefd', 'g3 a'  
X:1
L:1/8
M:2/2
K:Amix
 eAAc e2 ef | gafd edBA | eAAc e3 f | g3 d BA A2 | eAAc e2 ef | gafd edBA | dBde g3 a | 
 geed BA A2 :: a3 f g3 a | gefd e2 dB | eAef g3 a | geed BA A2 | a3 f g3 a | gefd e2 dB | 
 dBde g3 a | geed BA A2 ::"^variations" eAAc e2 ef | gefd edBd | eAAc e3 f | gfgd BA A2 | 
 eAAc e2 ef | gefd edBA | dBde g3 a | geed BA A2 :: a2 ef g3 a | gefd e2 dB | a2 ef g3 a | 
 geed BA A2 | a2 ef g3 a | gefd e2 dB | dBde g3 a | geed BA A2 :|  