As the ISS-Above’s are coming online I am getting a few questions about what all the blinking lights mean. Just in case you missed the email attachment or the printed document (in the Complete ISS-Above) here is the information about all that.
If you have an ISS-Above with a PiGlow / Ledborg / Blinkstick or Blink(1) they indicate an approximate time until the next pass of the ISS by flashing either red (more than an hour) green (less than one hour) and blue (less than 10 minutes).