go - Scanning for up and down arrow in Go?

Question

I'm trying to scan for the up and down arrow key codes in Go, but it doesn't seem to be working. So far I've tried this:

in = bufio.NewReader(os.Stdin)
b, err := in.ReadByte()
fmt.Println("Key code:", b, err)

But when I press the up or down key, it never stops reading (it never run the Println statement) and just displays "^[[A" and "^[[B" directly in the terminal. Any idea?