10 green V cans (Sing to the tune of 10 green bottles)

1 green V can,
sitting on the sill.
1 green V can,
sitting on the sill.
And if Jeff drinks 1 can,
to help him get over the hill,
There'll be 2 green V cans sitting on the sill.

2 green V cans,
sitting on the sill.
2 green V cans,
sitting on the sill.
And if Jeff drinks 1 can,
as a 'staying awake' pill,
There'll be 3 green V cans sitting on the sill.

3 green V cans,
sitting on the sill.
3 green V cans,
sitting on the sill.
And if Jeff drinks 1 can,
for concentration and sitting still,
There'll be 4 green V cans sitting on the sill.

4 green V cans,
sitting on the sill.
4 green V cans,
sitting on the sill.
And if Jeff drinks 1 can,
and still not go downhill,
There'll be 5 green V cans sitting on the sill.

5 green V cans,
sitting on the sill.
5 green V cans,
sitting on the sill.
And if Jeff drinks 1 can,
but not going for a refill,
There'll be 6 green V cans sitting on the sill.

6 green V cans,
sitting on the sill.
6 green V cans,
sitting on the sill.
And if Jeff drinks 1 can,
to improve his 'pulling an all-nighter' skill,
There'll be 7 green V cans sitting on the sill.

7 green V cans,
sitting on the sill.
7 green V cans,
sitting on the sill.
And if Jeff drinks 1 can,
out of his own freewill,
There'll be 8 green V cans sitting on the sill.

8 green V cans,
sitting on the sill.
8 green V cans,
sitting on the sill.
And if Jeff drinks 1 can,
and he is still not ill,
There'll be 9 green V cans sitting on the sill.

9 green V cans,
sitting on the sill.
9 green V cans,
sitting on the sill.
And if Jeff drinks 1 can,
(Is this a bit of an overkill?),
There'll be 10 green V cans sitting on the sill.