command line argument and a config register

main.go

@@ -1,18 +1,26 @@
 package main
 
 import (
+	"flag"
 	_ "image/jpeg"
 	_ "image/png"
 )
 
 func main() {
+	// command line arguments
+	flag.StringVar(&ConfigRegister.Method, "blending", "darken", "Blending methods : darken, lighten, fuckyfun")
+	flag.StringVar(&ConfigRegister.OutputDir, "output", "./", "Output directory")
+	flag.Parse()
+
 	// get two random images and load them
 	imgs := getRandomImages(2)
 	img1 := loadImage(imgs[0])
 	img2 := loadImage(imgs[1])
 
+	// pool of workers unionizing, ready to blend a new picture using the power of friendship
 	var pool blendWorkerPool
 	pool.InitWorkerPool()
 
+	// main blending routine
 	pool.BlendImages(img1, img2)
 }