Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:2/2
K:Dmix
['A>(BO c2) (dcB cBA>)(B c/d/c/B/ c>)(G EF)', '(ec c2)']  
X:1
L:1/8
M:2/2
K:Dmix
 A>(BO | c2) (dcB cBA>)(B | c/d/c/B/ c>)(G EF) G2 | A(d (3edc) de (=fe) | (dcA>)(G FGA>)(B | 
 c2) (AB) ce (dB) | (c/d/c/B/ c>)(G EC C2) | (DEFG) (AB)cA | (d/e/d/c/) A>(G FD) DO :: z | 
 (eg g2) (ec c2) | ecgc (ec c2) | (ea a2) (ed d2) | edad (ed d2) | (eg g2) (ec c2) | 
 (Gc c2) (ec c2) | (eg g2) d=fec | (dc)A>(G FD) D ||  