Through the Windows

Windows are:
 * Arched
 * Square
 * Diamond (not in old Play School)
 * Round

Bio
In UK Play School in 1964 to 1988 and old Play School from 1966 to 2001, three windows does not order. In new Play School from 2002, the Diamond was a new window and they muat to order, Square~Diamond~Round~Arched~Square.