On the Subject of Simon Strands

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1. One of the four coloured buttons will flash.
2. Interpret the signal from the flashing light using the Morse code chart to spell one of the words in the left column of the table.
3. Using the correct row, press the button with the corresponding colour to send a response.
4. The frequency to respond with is a number of rows below the row corresponding to the word, wrapping from bottom to top.
   This number corresponds to the colour of the flashing signal.
5. A new signal will be received which will require a new sequence of buttons to be pressed in order to respond.
6. The sequence will lengthen by one each time a correct response is sent until the module is disarmed.
7. If the module is left idle until the sequence of flashes begins, an incorrect button is pressed, or the wrong frequency is submitted, the sequence of inputs is reset.

How to Interpret
1. A short flash represents a dot. 2. A long flash represents a dash. 3. There is a long gap between letters. 4. There is a very long gap before the word repeats.

	Red Flash	Blue Flash	Green Flash	Yellow Flash
reject	Yellow	Green	Red	Blue	3.505 MHz
revert	Green	Yellow	Red	Blue	3.512 MHz
drift	Blue	Green	Yellow	Red	3.515 MHz
bistro	Blue	Yellow	Red	Green	3.519 MHz
disks	Red	Green	Yellow	Blue	3.522 MHz
parity	Yellow	Red	Blue	Green	3.532 MHz
staple	Green	Red	Blue	Yellow	3.535 MHz
engulf	Red	Yellow	Green	Blue	3.542 MHz
called	Blue	Green	Red	Yellow	3.545 MHz
risky	Green	Yellow	Blue	Red	3.552 MHz
shard	Yellow	Blue	Red	Green	3.562 MHz
engage	Blue	Red	Yellow	Green	3.565 MHz
tariff	Red	Yellow	Blue	Green	3.571 MHz
desks	Green	Red	Yellow	Blue	3.575 MHz
strobe	Green	Blue	Yellow	Red	3.578 MHz
discs	Yellow	Green	Blue	Red	3.582 MHz
hardy	Red	Blue	Yellow	Green	3.585 MHz
caller	Green	Red	Yellow	Blue	3.592 MHz
streak	Red	Green	Blue	Yellow	3.595 MHz
exact	Yellow	Red	Green	Blue	3.599 MHz

Red Signal	Blue Signal	Green Signal	Yellow Signal
The greater of the number of strikes and the lowest numeric digit of the serial number.	The number of minutes remaining on the bomb timer.	The number of armed modules, including needy modules.	The alphabetic position of the letter of the serial number in the position equal to the smaller of the number of letters in the serial number and the length of the sequence of flashes.

Note: The number is evaluated at the beginning of the signal’s transmission and does not change until a new signal is received.