> go get github.com/zxbit2011/gifCaptcha

package main

import (
    "github.com/zxbit2011/gifCaptcha"
    "image/color"
    "image/gif"
    "net/http"
)

var captcha = gifCaptcha.New()

func main() {
    //设置颜色
    captcha.SetFrontColor(color.Black, color.RGBA{255, 0, 0, 255}, color.RGBA{0, 0, 255, 255}, color.RGBA{0, 153, 0, 255})
    http.HandleFunc("/img", func(w http.ResponseWriter, r *http.Request) {
        gifData, code := captcha.RangCaptcha()
        println(code)
        gif.EncodeAll(w, gifData)
    })
    http.ListenAndServe(":8080", nil)
}