Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
Q:1/4=120
M:4/4
K:Eb
['[G,E]2 (G>A)', '(eg/e/) (Be/B/) (GB/G/) (E_D)']  
X:1
L:1/8
Q:1/4=120
M:4/4
K:Eb
"^Mysteriously" B, | [G,E]2 (G>A) .B.G .E._D | (C=E) (F/G/F/_E) (DB,) (=B,C/D/) | 
 [G,E]2 (G>A) .B.G.E._D | (CE) (D/E/F/D/) (B,E) [G,E] :| B | (eg/e/) (Be/B/) (GB/G/) (E_D) | 
 (C=E) (F/G/F/_E/) D"^up"B-[DB].c/.d/ | (eg/e/) (Be/B/) (GB/G/) (E_D) | 
 (CE) (D/E/).F/.D/ B,E [G,E]B | (e/^f/g/e/) (B/d/e/B/) (G/=A/B/G/) (E_D) | 
 (C=E) (F/G/F/_E/) (DB,) (=B,C/D/) | ([G,E]D/C/) (B,A,/G,/) .A,.B,.C.E (B,E) [G,E] ||  