Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
M:2/4
K:C
['(c/d/)(e/d/) (c/d/)(e/d/)', 'fffa (3agf g2 g2'  
X:1
L:1/8
M:2/4
K:C
|: (c/d/)(e/d/) (c/d/)(e/d/) | cG EC | (c/d/)(e/d/) (c/d/)(e/d/) | c3 G ::[K:F] fffa | (3agf g2 | 
 g2 ga | (3gfg a2 | fffa | (3agf g2 | g2 ge/g/ | f2 z2 :|  