Continuous NULL value in a column

[Neil Huang]

Hello all,

I have data show as following.And the result I want also show below.

Here's what I want to do:
I want to know is there exist a continuous null in Value column
If exist and if the number larger than 2 then count the null value

e.g.:
In sequence 3 and 4, their value are Null (continuous), but only 2, so not eligible
In sequence 6, 7 and 8, their value are Null (continuous), and this is 3(larger than 2), so eligible
In sequence 10, 11, 12 and 13, their value are Null (continuous), and this is 4(larger than 2), so eligible
So the final result: 3+4=7

EQUIPMENT
+-----------+------------+-----------+
| ID | Sequence | Value |
+-----------+------------------+-----+
| 0001 | 1 | 76 |
+-----------+------------------+-----+
| 0001 | 2 | 90 |
+-----------+------------------+-----+
| 0001 | 3 | NULL |
+-----------+------------------+-----+
| 0001 | 4 | NULL |
+-----------+------------------+-----+
| 0001 | 5 | 12 |
+-----------+------------------+-----+
| 0001 | 6 | NULL |
+-----------+------------------+-----+
| 0001 | 7 | NULL |
+-----------+------------------+-----+
| 0001 | 8 | NULL |
+-----------+------------------+-----+
| 0001 | 9 | 45 |
+-----------+------------------+-----+
| 0001 | 10 | NULL |
+-----------+------------------+-----+
| 0001 | 11 | NULL |
+-----------+------------------+-----+
| 0001 | 12 | NULL |
+-----------+------------------+-----+
| 0001 | 13 | NULL |
+-----------+------------+-----------+


Result:
+-----------+----------------------+
| ID | Total_eligible_NULL |
+-----------+----------------------+
| 0001 | 7 |
+-----------+----------------------+

Is it possible to achieve that?