add go example

example.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+	//mathRand "math/rand"
+	cryptoRand "crypto/rand"
+	"math/big"
+	"time"
+)
+
+func main() {
+	fmt.Println("Hello, playground", time.Now())
+	nBig, err := cryptoRand.Int(cryptoRand.Reader, big.NewInt(27))
+	if err != nil {
+		panic(err)
+	}
+	n := nBig.Int64()
+
+	//b := []byte{0}
+	//r := cryptoRand.Reader.Read(b)
+	fmt.Println("r", n)
+	//fmt.Println("Random", mathRand.Seed(r).Intn(9))
+}