Create an approximately 45-50x50-55 meters area.
Mark two zones on the sides of the field as shown.
Split the team into two of seven players and identify them with different colours.
Select two neutral players with a third colour. They position themselves in the side zones and they can play with maximum two touches during the game.
Put a goalkeeper in each goal.
Of course the game can be played with other number of players, but in that case the organizational conditions also change. 

7v7 game with 2 neutral players who support the team in possession in a special way.
The players possess the ball with accurate combination play within the lines. They cannot enter the side zones, only the neutral players are active there, who can play with maximum two touches.
During possession, teams are not allowed to use neutrals, if one of them gets the ball, he has two touches to cross or make a lobbed ball from behind. It depends on their position.
If the teams score a goal after a crossing by one of the neutral players from the sides, it's worth 2 points, if they score after a combination play in the middle it's worth 1 point.