Did you see people flashing their lights last night?’ ‘Oh,’ Pei said, her inner eyelids blinking. ‘I saw some lights on the horizon, but I thought it was just . . . power trying to come back on. Or something.’ Ouloo stuck out the tip of her tongue in the negative. ‘That was on purpose. I don’t know who started it. I saw someone’s lights flash, and then I saw someone else do the same in reply, so I turned my lights off and on four times, and then we just . . . did that for a while.’ ‘Was it some kind of code? Four for okay, three for help, that kind of thing?’ ‘No, not at all. Though that kind
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