Chika chika

Chika chika is used when someone is dazzled by strong light, picture etc.
It could also used when the light is blinking.(e.g. pedestrian light for crossing).

i.e)
Jp: kamera no furasshu de me ga CHIKA CHIKA shita.
　かめらのふらっしゅでめがチカチカした
En: I was dazzled by the camera's flash.

Jp: shingou ga CHIKA CHIKA shiteiruyo. isoge!
　しんごうがチカチカしてるよ。いそげ！
En: That light is blinking. Hurry up!