Compose a piece based on the given chord sequence.
'Gm', 'D', 'Gm', 'D', 'Gm', 'Cm', 'Gm', 'D', 'Gm', 'Gm', 'F', 'Eb', 'G', 'Cm', 'Gm', 'D', 'Gm'  
X:1
L:1/8
M:2/4
K:Gmin
 DDD |:"Gm" G2 B2 BBGG |"D" ^F d2 d- ddDD |"Gm" G2 B2 BBGG |"D" ^F A2 A- AADD |"Gm" G2 B2 BBGG | 
 ^F g2 g- gg"Cm"cc |"Gm" B2 B2"D" AAAA |"Gm" GGFG z :: ddd |"Gm" d2 g2 ggdd | g b2 b- bbdd | 
"F" c2 f2 ffcc | f a2 a- aacc |"Eb" B _e2 e- eedc |"G" d g2 g- gg"Cm"cc |"Gm" B2 B2"D" AAAA | 
"Gm" GGFG z :|  