Help and account substrings extraction

good, I wish to raise my problem, because I know how to do. I, for example have a long string as follows:

[3 -1 -1 -1 -1 -1 1 -1 -1 -1 0 -1 -1 -1 -1 4 -1 0 -1 -1 -1 0 -1 -1 3 -1 -1 -1 -1 -1 -1 4 -1 -1 0

-1 1 -1 -1 -1 0 -1 1 -1 -1 -1 -1 -1 -1 1 -1 0 -1 -1 4……..

What I want to do is the following:

1) extracting substrings so that starts for next 3/4 and ends 3/4 including the upcoming latter. For example:

[-1 -1 -1 -1 -1 1 -1 -1 -1 0 -1 -1 -1 -1 4]

Next substring;

[-1 0 -1 -1 -1 0 -1 -1 3]

Next substring;

[-1 -1 -1 -1 -1 -1 4]

And so on

2nd) I have to count occurrences of a given substring and also recounting the lengths associated with each substring:

For example we have:

a) [-1 -1 -1 1 -1 0 -1 4]

b) [-1 0 -1 -1 1 4]

SUBSECUENCE__________________REPETITIONS__________Nº(-1)

1 0 4 ----------------------------------------------------2---------------------------------5

1 0 4 ----------------------------------------------------2---------------------------------3

(Note: subsecuence is obtained by eliminating (-1))

We see that the pattern [1 0 4] repeats in a) and b) therefore is repeated twice. In a) there are 5 (-1). In b) there are 3 (-1). How could I make? I do not know how to do.

thank you very much