package main

import "fmt"

// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func() int {
	a := 1
	b := 1
	c := 0
	n := 0
	return func() int {
		n += 1
		if n < 3 {return 1}

		c = a + b
		a, b = b, c

		return b
	}
}

func main() {
	f := fibonacci()
	for i := 0; i < 10; i++ {
		fmt.Println(f())
	}
}