Use the pic with the nixie tubes in it as a reference to where the wires go and the math operations to use. Then follow this to figure out the numbers you need. For example the hours combinator would be " S / 3600 "
The modulo operation is the % symbol.
"In order to convert the Elapsed Time we have to use the modulo operation. To get the Hours we have to divide the number of seconds by 3600 (because there are 3600 seconds in an hour) To get the Minutes we have to divide the Elapsed Time by 60 first and then use the modulo operation with 60 as the divisor. Lastly, to get the seconds we only have to use the modulo operation with 60 as the divisor."
