Go pic thing

package main

import (
	"sync"
)

func Pic(dx, dy int) [][]uint8 {
	pic := make([][]uint8, dy)

	n := 1
	wg := sync.WaitGroup{}
	wg.Add(n)

	for d := 0; d < n; d++ {
		go func(s [][]uint8) {
			for y, _ := range s {
				s[y] = make([]uint8, dx)
				for x := 0; x < dx; x++ {
					s[y][x] = uint8(x ^ y)
				}
			}
			wg.Done()
		}(pic[dy*(d/n) : dy*((d+1)/n)])
	}

	wg.Wait()
	return pic
}

func main() {
	const (
		dx = 1 << 16
		dy = 1 << 16
	)
	Pic(dx, dy)
}