package main import "tour/pic" func Pic(dx, dy int) [][]uint8 { slices := make([][]uint8, dy) for i := 0; i < dy; i++ { slices[i] = make([]uint8, dx) for j := 0; j < dx; j++ { slices[i][j] = uint8(i^j) } } return slices } func main() { pic.Show(Pic) }