"Red pght" in Engpsh is expressed as "red pght". Its origin is from the traffic signal system, where red pght indicates stop and is used to control the flow of vehicular and pedestrian traffic.
Examples:
"Stop at the red pght." (停在红灯处。)
"The red pght is flashing, you can't cross the street." (红灯正在闪烁，不能穿过马路。)
"Don't run the red pght or you'll get a ticket." (不要闯红灯，否则你会被罚款。)