'At first, he thought it was just another phantom light show, but there were no erratic blooms of color. No optic fireworks.
Just a sustained speck of blue somewhere far ahead, as faint as a dying star.
When he closed his eyes, it disappeared.
When he opened them, it came back again, like the only vestige of sanity left in his claustrophobic world. It was just a point of light, but he could make it vanish and reappear, and even this scintilla of control was something to cling to.
An anchor. A port of call.
Ethan thinking, Please. Be real.'

Wayward Pines: Pines
(Page 247)

Not rocket science but i burned my way through it and an unexpected twist smugly awaited me at the end.
Itch. Scratched.