## from

[["<span>x</span>", "-", "-", "-", "-", "-", "-", "-"], ["<span>x</span>", "-", "-", "-", "-", "-"]]

## to

# assuming the number of characters for each measures pattern is 32

[["<span>x</span>-------<span>x</span>-------<span>x</span>-------<span>x</span>-------", "<span>x</span>-----<span>x</span>-----<span>x</span>-----<span>x</span>-----<span>x</span>-----<span>x</span>-"], ["<span>x</span>-------<span>x</span>-------", "----<span>x</span>-----<span>x</span>-----"]]