These are adhesive window transparencies, silkscreened with 6 colour overlays and are available as Magic Squares Patterns. When placed on the inside of a glass window, the sun projects the geometry into the room as coloured light.
This can be projected onto the body for healing purposes.
Different Magic Square Numbers are traditionally attributed to the 7 planets and their specific Magic Sums or Magic Square Constants, like 15, 34, 65, 111 and 175 etc were secret numerical and ecclesiastical codes for the many Multi-Cultural names of God, YHVH, Allah, Messiah, Jesus, Adonai, Abraxas etc.