Craft a tune that adheres to the provided chord pattern.
'Gm', 'Cm', 'Gm', 'D7', 'Gm', 'F7', 'Bb', 'D7', 'Gm', 'D7', 'Gm', 'Gm', 'Cm', 'Gm', 'D7', 'Gm', 'D7', 'Gm'  
X:1
L:1/4
M:3/4
K:Gmin
|:"Gm" z z z | z z z | z z z | z z z | z z z | z z z |"Cm" z z z | z z z | z z z | z z z | 
"Gm" z z z | z z z |"D7" z z z | z z z |"Gm" z z z |1 z z z :|2 z z z |:"F7" z z z | z z z | 
"Bb" z z z | z z z |"D7" z z z | z z z |"Gm" | z z z | z z z | z z z |"D7" z z z | z z z | z z z | 
 z z z |"Gm" |1 z z z :|2 z z z |:"Gm" z z z | z z z | z z z | z z z |"Cm" z z z | z z z | 
"Gm" z z z | z z z |"D7" z z z | z z z |"Gm" z z z | z z z |"D7" z z z | z z z |"Gm" z z z |1 
 z z z :|2 z z z ||  