My solution for the slice exercise on A Tour of Go.

Exercise: Slices

Implement Pic. It should return a slice of length dy, each element of which is a slice of dx 8-bit unsigned integers. When you run the program, it will display your picture, interpreting the integers as grayscale (well, bluescale) values.

The choice of image is up to you. Interesting functions include (x+y)/2, x*y, and x^y.

package main
import (
 "golang.org/x/tour/pic"
)
func Pic(dx, dy int) [][]uint8 {
 //using make to create a slice of length dy
 pic := make([][]uint8, dy)
 for i := 0; i < dy; i++ {
  //using make to create a slice of length dx
  pic[i] = make([]uint8, dx)
 }
 //creating image
 for y, _ := range pic {
  for x, _ := range pic[y] {
   //choice for image
   
   //pic[y][x] = uint8(x ^ y)
   pic[y][x] = uint8(x+y)/2
   //pic[y][x] = uint8(x-y)
   //pic[y][x] = uint8((x <<uint8(y))/2)
  }
 }
 return pic
}
func main() {
 pic.Show(Pic)
}

Output:

Simple and straight forward let me know if there is a better solution (: