Updated README.md

Author: bigsk05

README.md

@@ -1,3 +1,51 @@
-# richkago
+# Richkago - GoLang Download Engine
 
-GoLang Download Engine
+#### Richka (From Ukrainian: Рiчка) means river, stands for the download speed of Richka Engine
+
+#### This project is only active on GitHub (https://github.com/ghinknet/richkago), repositories on any other platform are mirror
+#### We will not process PRs or Issues outside of GitHub
+
+#### Richka for python is here (https://github.com/ghinknet/richka)
+
+## Usage
+
+`import "github.com/ghinknet/richkago"` and run script in your code, for example:
+
+```
+package main
+
+import (
+	"fmt"
+	"github.com/ghinknet/richkago"
+	"time"
+)
+
+func main() {
+	controller := richkago.NewController()
+
+	go func() {
+		// Start download
+		timeUsed, fileSize, err := richkago.Download("https://mirrors.tuna.tsinghua.edu.cn/raspberry-pi-os-images/raspios_lite_arm64/images/raspios_lite_arm64-2024-11-19/2024-11-19-raspios-bookworm-arm64-lite.img.xz", "2024-11-19-raspios-bookworm-arm64-lite3.img.xz", controller)
+		if err != nil {
+			fmt.Println("Download failed:", err)
+			return
+		}
+
+		// Print result
+		fmt.Printf("Time used: %.2f seconds\n", timeUsed)
+		fmt.Printf("Speed: %.2f MiB/s\n", float64(fileSize)/timeUsed/1024/1024)
+	}()
+
+	// Monitor progress
+	for controller.Status() != 0 && controller.Status() != -3 {
+		if controller.Status() == 1 {
+			fmt.Printf("Download Progress: %.2f%%\r", controller.Progress())
+		}
+		time.Sleep(100 * time.Millisecond)
+	}
+	if controller.Status() == 0 {
+		fmt.Println("Download completed.")
+	}
+}
+```
+Then you'll get a file from Internet :D.