Conditional Design is a game as players play together.
In each turn the player marks a dot with the colour they've chosen with the lines that has it pointing in different angles in a piece of paper.
Then the next player draws a line where to match the direction of the line.
Once the lines have attached it becomes a shape and fills up the shape with the players colour.
Another conditional design is a two player game where each writes down the letters of their date of birth creating different forms of patterns.