Peter: Do you have a brother, John?

John: Yes, I do. His name is Mike.

Peter: Is he older than you?

John: No, he is younger than me. He is three years younger than me. He is 12 years old.

Peter: He is shorter than you, isn't he?

John: No, he is a little taller than me.

Peter: Are his eyes bigger than yours?

John: Yes, his eyes are bigger than mine.

Peter: Who loves sports more, you or your brother?

John: He does. He is good at playing football.

晓彤同学在科技活动小组中为学校茶炉房设计了如图1所示的人工控制电路．用红绿灯分别表示水是否烧开，只红灯亮，表示水未烧开，只绿灯亮，表示水已烧开．

已知椭圆 $x^2+m{y}^2=1$ 的焦点在y轴上，长轴长是短轴长的两倍，则 m 的值为（  ）