Batak manuscript books from north Sumatra, written on tree-bark and then folded accordion-style, are known as pustaha. These generally contain texts on divination and spells, and were compiled by a shaman known in Batak as a datu.  Many pustaha contains magical diagrams in red and black ink, and a symbol that frequently appears in these Batak books is a design of two overlapping squares, the smaller one rotated by 45 degrees and set within the other, with eight looped corners.  The upright square is called bindu matoga, and the diagonal one bindu matogu.  In some pustaha this symbol is shown enclosing a turtle, and is itself surrounded by a snake.  […]

Source: The Ring of Solomon in Southeast Asia