diff --git a/issue23/Test2.png b/issue23/Test2.png
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index 108f01c..0000000
Binary files a/issue23/Test2.png and /dev/null differ
diff --git a/issue23/android.png b/issue23/android.png
deleted file mode 100644
index ffa068b..0000000
Binary files a/issue23/android.png and /dev/null differ
diff --git a/issue23/go.png b/issue23/go.png
deleted file mode 100644
index 6ee5238..0000000
Binary files a/issue23/go.png and /dev/null differ
diff --git a/issue23/issue23.go b/issue23/issue23.go
deleted file mode 100644
index 3e7643a..0000000
--- a/issue23/issue23.go
+++ /dev/null
@@ -1,64 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"fmt"
-	"image"
-	"image/draw"
-	"image/png"
-	"log"
-	"math"
-	"os"
-
-	"github.com/llgcode/draw2d"
-)
-
-func saveToPngFile(filePath string, m image.Image) {
-	f, err := os.Create(filePath)
-	if err != nil {
-		log.Println(err)
-		os.Exit(1)
-	}
-	defer f.Close()
-	b := bufio.NewWriter(f)
-	err = png.Encode(b, m)
-	if err != nil {
-		log.Println(err)
-		os.Exit(1)
-	}
-	err = b.Flush()
-	if err != nil {
-		log.Println(err)
-		os.Exit(1)
-	}
-	fmt.Printf("Wrote %s OK.\n", filePath)
-}
-func main() {
-	file, err := os.Open("android.png")
-	if err != nil {
-		log.Fatal(err)
-	}
-	defer file.Close()
-	a, _, err := image.Decode(file)
-
-	//load go icon image
-	file2, err := os.Open("go.png")
-	if err != nil {
-		log.Fatal(err)
-	}
-	defer file2.Close()
-	g, _, err := image.Decode(file2)
-
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	ar := a.Bounds()
-	w, h, x := ar.Dx(), ar.Dy(), 30.0
-	i := image.NewRGBA(image.Rect(0, 0, w, h))
-	draw.Draw(i, ar, a, ar.Min, draw.Src)
-
-	tr := draw2d.NewRotationMatrix(x * (math.Pi / 180.0))
-	draw2d.DrawImage(g, i, tr, draw.Over, draw2d.LinearFilter)
-	saveToPngFile("Test2.png", i)
-}