conditional drawing

From conditionaldesign.org
http://conditionaldesign.org/workshops/in-de-knoop/

KNOTS:

First Step:
The first player draws a line.
The other players draw a line that goes over
and under the last drawn line.


In Turns:
The player elongates his/her line on both ends.
The elongations have to go over and under a line
of another player and may not go over the line of 
the same color twice in a row.

When a line can no longer be elongated, it is
considered dead for the rest of the game When
both ends of a line have died, the player may
place a new line.

the conditional design manifesto
http://conditionaldesign.org/manifesto/