package main

import "golang.org/x/tour/pic"

func Pic(dx, dy int) [][]uint8 {
	var ret [][]uint8 = make([][]uint8, dy)
	for i:=0; i != dy; i++{
		ret[i] = make([]uint8, dx)
		for j:=0; j != dx; j++{
			ret[i][j] = uint8(i * i + j * j)
		}
	}
	return ret
}

func main() {
	pic.Show(Pic)
}