It's a right. John is looking at the sky.

Tom is John's younger¹ brother. He asks John “What are you doing?”

John says, “I'm counting stars.”

Tom laughs and says, “It's really dark² now. Why not count them tomorrow morning?”

中文：

这是一个晚上。约翰抬头看着天空。

汤姆是约翰的弟弟。他问约翰：“你在干什么？”

约翰说：“我在数星星。”

汤姆笑着说：“现在天空太黑了。你为什么不等到明天早上再数呢？”