 
 <prompt> Wetin happun bifor, na di first traffic light wey dem put or wey explode? Based on di last question, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: ```Green fit communicate safety make person fit waka, like for traffic lights. Green and red don become standard colors for international railroad signals since 19th century. The first traffic light wey use green and red gas lamps, na for 1868 e be for front of the Houses of Parliament for London. E explode the next year, and e wound the policeman wey dey operate am. For 1912, the first modern electric traffic lights dem put am for Salt Lake City, Utah. Red dey chosen mostly because e dey very visible, and e dey relate to danger, while green dey chosen mostly because e no fit be mistaken for red. Today green lights dey signal say system dey on and dey work as e suppose dey work. For many video games, green dey show say person get health and person don complete objectives, opposite red.``` 