Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:4/4
K:Bmin
['DE E2 FE DB,B,/B,/B, DB,A,C FEDE', 'B2 AG FBAF A2 FA']  
X:1
L:1/8
M:4/4
K:Bmin
 DE |:"Bm" FBAF"A" E2 FE |"G" DB,B,/B,/B, DB,A,C |"Em" B,EE/E/E"F#m" FEDE |"G" FABc dcBA | 
"Bm" FBAF"A" E2 FE |"G" DB,B,/B,/B, DB,A,C |"Em" B,EE/E/E"F#m" FEDE |"Bm" FBBA B2 AG :: 
"D" FBAF A2 FA |"A" B/c/deg"D" fdde | f/f/faf"A" egfe |"G" dBAF"Bm" B2 AG |"D" FBAF A2 FA | 
"A" B/c/deg"D" fddf | bfaf"A" egfe |"G" dBAF"Bm" B4 :|  