4 sentences

1. 过马路时要看红绿灯。

   guò mǎ​lù shí yào kàn hóng​lǜ​dēng.

   Watch the traffic lights when crossing the road.

   Source: Dong Chinese Dictionary

2. 下个红绿灯左转。

   xià gè hóng​lǜ​dēng zuǒ​zhuǎn.

   Turn left at the next light.

   Source: OpenSubtitles

3. 请在前面的红绿灯处向左拐弯。

   qǐng zài qián​miàn de hóng​lǜ​dēng chù xiàng zuǒ guǎi​wān.

   Please turn left at the traffic light ahead.

   Source: Dong Chinese Dictionary

4. 你往前走，然后往右转，过了红绿灯就到了。

   nǐ wǎng​qián zǒu, rán​hòu wǎng yòu zhuǎn, guò le hóng​lǜ​dēng jiù dào le.

   Go forward, then turn right, go through the traffic light, and you're there.

   Source: Tatoeba