Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:3/4
K:D
['F2 F/G/F/G/ AA A2 G2 F2', 'd3 BcA'  
X:1
L:1/8
M:3/4
K:D
"^A" F2 F/G/F/G/ AA | A2 G2 F2 | DFDFDF | G2 E4 | F2 F/G/F/G/ AA | A2 G2 F2 | EG/E/ D2 C2 | D6 || 
"^B" E2 EEEE | F2{EF} D4 | F2 FF AF |{G} F2{EF} E4 | A2 AAAA | B2 BBBB | c2 cccc | d6 | d3 BcA | 
 d3 BcA | B2 A2 ^G2 | A3 ABA | GFEGAG | FEDABA | GFEGAG | FEDAdc | B4 A2 | G4 F2 | EF G2 F2 | 
 F2 E4 | F2 F/G/F/G/ AA | A2 G2 F2 | EG/E/ D2 C2 | D6 |]  