Compose a piece adhering to the given musical structure and theme.
X:1
L:1/8
Q:1/8=120
M:2/4
K:D
['Af f/g/f eB B/c/B e/f/e', 'f>A fA fe d/e/c/d/ B2 B2 B/c/d/e/', 'ce dB A/A/A f/f/f gb ac d'  
X:1
L:1/8
Q:1/8=120
M:2/4
K:D
"^polka" Af f/g/f | eB B/c/B | e/f/e A/B/A | df a2 |"^5" Af f/g/f | eB B/c/B | e/f/e AB/c/ | 
 dfd z :|"^9" B2 B/c/d/e/ | f2 f>A | fA fe | d/e/c/d/ B2 |"^13" B2 B/c/d/e/ | fff F/A/ | 
 B/d/c/B/ A/g/e/c/ | d2 d z :|"^17" Af ce | dB A/A/A | fa gb | af d/d/d |"^21" Af ce | dB A/A/A | 
 f/f/f gb | ac d z :|  