Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
M:2/4
K:D
['AF dF AF', 'df/g/ af bg af'  
X:1
L:1/8
M:2/4
K:D
 B | AF dF | AF DB | AF de | c2 EF/G/ | AF dF | AF Df | ed ef | d3 :: c | df/g/ af | bg af | 
 fe df | e3 f | df/g/ af | bg af | ed ef | d3 :|  