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standard time XV
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25 spots are arranged in a 5 x 5 matrix.

Every spot is switched on and off by a timer, that takes
the digits of Pi to define its parameters.
 The first spot, for instance, is dark during
141 units and bright during 141 units, dark during the
following 141 units, bright for the next 141 units and so on.
The second spot has the parameter 592...

 


 
 
 

HAEL...YXXS
8. 4. 2300 n. Arc.