Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:12/8
K:D
['B |{G} A z A{c} AzA{c} ABA', 'FzE DFA{.c} BA B{c}BA FzA (d2 d)', 'BzA BdA BdA B{c}BA F2 A dzd{^g}', 'BzA BdA BdA B{c}BA F2 A dzd{^g}']  
X:1
L:1/8
M:12/8
K:D
 !fermata!d2 B |{G} A z A{c} AzA{c} ABA FzE | DFA B{c}BA B{c}BA F2 A | dzd{^g} a2 =g F{a}fd B3 | 
 A2 A{c} AFA d3 d2 B || .A.A.A .Az.A .A.BA FzE | DFA{.c} BA B{c}BA FzA | (d2 d) a2 g f{a}fd B2 z | 
 A2 A{c} AFA (d3 d2) A || dzd{^g} a2 =g f{a}fd BzA | BdA BdA | B{c}BA F2 A | 
 dzd{^g} a2 =g f{a}fd B2 z | AAA{c} AF.A (d3 d2) A || d{e}dd azg f{g}fd BzA | BdA BdA | 
 B{c}BA F2 A | dzd{^g} a2 =g f{a}fd B2 z |{G} AAA{G} AFA d3 d2 B ||  