According to Burgey,
There are apparently now rules in indoor cricket that if you play out three balls in a row without scoring you have to run on the fourth ball. I hadn't played for years and filed in for a game last year with some of the younger blokes in our club.
It is very interesting. If a Batsman scores 0 after 4 balls, that Batsman is out. This rule would make the game faster and more spectacular.
And I think that an out should mean the end of that over. So 1 over can end by 4 balls.
In the Limited-Over games, 1 over should be 6 balls. In Tests, 1 over should be 8 balls.
I hope that this rule will be adopted as a Law of all-types of Cricket.
From my first post, there was an unclear point.
This "4-ball out" rule must be applied to only the first 4 balls of an over. So, if a Batsman scores in the 1st ball of an over, there will be no out if that Batsman scores no run from 2nd to 5th balls.