Regarding awk start and end pattern

[Sujoy Choudhury]

Hi,

In a file I am trying to find a pattern in this way.
The start/end patterns are repetitive in the file.
So, I want to process this pattern occurrence one by one.

eg.
File.txt

line1..

line2..
# First pattern

start pattern
...
...
end pattern
....
....
# Second pattern
start pattern
...
...
end pattern
...
...
# Third pattern
start pattern
...
...
end pattern
...
line n...

When I execute `awk '/start pattern/,/end pattern/' file.txt` I get

start pattern
...
...
end pattern
start pattern
...
...
end pattern
start pattern
...
...
end pattern

Now, how can I process each occurrence one by one?