{
	// 1 dimensional checker board.
	int $x;
	int $modX;
	for ($x = 0; $x < 10; $x++)
	{
		$modX = $x % 2;
		// place a cube every other time
		if ($modX)
		{
			polyCube;
			move $x 0 0;
		}
	}
}