Craft a fitting chord progression to merge seamlessly with the given musical theme.
|: aA A2 cAeA | Bcde f2 fg | aA A2 cAeA | fd ge a3 g | aA A2 cAeA | 
 Bcde f2 fg | agfe fedc |1 df ec A2 fg :|2 df ec A2 ed |: 
 cAEA cAeA | Bcde f2 ed | cAEA cAeA | fd ge a2 ed | cAEA cAeA | 
 Bcde f2 fg | agfe fedc |1 df ec A2 ed :|2 df ec A2 AF |]: 
 EAAB cABA | GABc dBEB | GBEB GBEB | GBEB A2 cA | eAAB c2 BA | GABc defg | 
 agfe fedc |1 df ec A2 AF :|2 defg a2 |]  
X:1
L:1/8
M:4/4
K:A
|:"A" aA A2 cAeA |"Bm" Bcde"E7" f2 fg |"A" aA A2 cAeA |"D" fd"E7" ge"A" a3 g |"A" aA A2 cAeA | 
"Bm" Bcde"E7" f2 fg |"D" agfe"Bm" fedc |1"D" df"E7" ec"A" A2 fg :|2"D" df"E7" ec"A" A2 ed |: 
"A" cAEA cAeA |"Bm" Bcde"E7" f2 ed |"A" cAEA cAeA |"Bm" fd"E7" ge"A" a2 ed |"A" cAEA cAeA | 
"Bm" Bcde"E7" f2 fg |"D" agfe"Bm" fedc |1"D" df"E7" ec"A" A2 ed :|2"D" df"E7" ec"A" A2 AF |]: 
"A" EAAB cABA |"E7" GABc dBEB |"E7" GBEB GBEB |"E7" GBEB"A" A2 cA |"A" eAAB c2 BA |"E7" GABc defg | 
"D" agfe"Bm" fedc |1"D" df"E7" ec"A" A2 AF :|2"E7" defg"A" a2 |]  