Custom page with blank staves

[Ivanov Dmitry]

I am working with piano teacher upon solving the harmonization
exercises. To solve them I need a blank sheet with music staves
grouped by 2 with treble and bass clefs.

Usually one exercise requires 2 sets of staves (4 staves totally). So
far I was able to use this code from the template
(https://lsr.di.unimi.it/LSR/Snippet?id=663). I created an ideal image
of what I want. But I am not sure that there will be enough space on
the page to contain 8 pairs of staves if we add extra space.

Can someone help me with adjusting the code?

blank.ly
Description: Text Data

ideal.png
Description: PNG image