diff --git a/.gitignore b/.gitignore
index 3e2dcc8..c97edc9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -90,3 +90,8 @@ examples/bitmap/test_IMG.png
 examples/bitmap/imgToBitmap/test_01.png
 examples/bitmap/imgToBitmap/test_002.jpeg
 examples/bitmap/imgToBitmap/test_003.jpeg
+examples/bitmap/imgToBitmap/test_1.png
+examples/bitmap/imgToBitmap/test_2.jpeg
+examples/bitmap/imgToBitmap/test.png
+examples/bitmap/imgToBitmap/test_7.jpeg
+robot_img.png
diff --git a/README.md b/README.md
index 9b82400..d8a0c44 100644
--- a/README.md
+++ b/README.md
@@ -125,7 +125,7 @@ Note go1.10.x C file compilation cache problem, [golang #24355](https://github.c
 package main
 
 import (
-	"github.com/go-vgo/robotgo"
+  "github.com/go-vgo/robotgo"
 )
 
 func main() {
@@ -183,9 +183,9 @@ func main() {
 package main
 
 import (
-	"fmt"
+  "fmt"
 
-	"github.com/go-vgo/robotgo"
+  "github.com/go-vgo/robotgo"
 )
 
 func main() {
@@ -196,7 +196,7 @@ func main() {
   fmt.Println("color---- ", color)
 
   sx, sy := robotgo.GetScreenSize()
-	fmt.Println("get screen size: ", sx, sy)
+  fmt.Println("get screen size: ", sx, sy)
 }
 ```
 
@@ -206,9 +206,9 @@ func main() {
 package main
 
 import (
-	"fmt"
+  "fmt"
 
-	"github.com/go-vgo/robotgo"
+  "github.com/go-vgo/robotgo"
 )
 
 func main() {
@@ -302,9 +302,9 @@ func event() {
 package main
 
 import (
-	"fmt"
+  "fmt"
 
-	"github.com/go-vgo/robotgo"
+  "github.com/go-vgo/robotgo"
 )
 
 func main() {
diff --git a/README_zh.md b/README_zh.md
index ce80829..cf85f8a 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -194,7 +194,7 @@ func main() {
   fmt.Println("color----", color)
 
   sx, sy := robotgo.GetScreenSize()
-	fmt.Println("get screen size: ", sx, sy)
+  fmt.Println("get screen size: ", sx, sy)
 }
 ```
 
diff --git a/clipboard/clipboard_darwin.go b/clipboard/clipboard_darwin.go
index 58d4a2d..eedd4c3 100644
--- a/clipboard/clipboard_darwin.go
+++ b/clipboard/clipboard_darwin.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin
 // +build darwin
 
 package clipboard
diff --git a/clipboard/clipboard_unix.go b/clipboard/clipboard_unix.go
index dcae808..fde35cb 100644
--- a/clipboard/clipboard_unix.go
+++ b/clipboard/clipboard_unix.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build freebsd || linux || netbsd || openbsd || solaris || dragonfly
 // +build freebsd linux netbsd openbsd solaris dragonfly
 
 package clipboard
diff --git a/clipboard/clipboard_windows.go b/clipboard/clipboard_windows.go
index 406bb65..2b9202e 100644
--- a/clipboard/clipboard_windows.go
+++ b/clipboard/clipboard_windows.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build windows
 // +build windows
 
 package clipboard
diff --git a/examples/bitmap/imgToBitmap/main.go b/examples/bitmap/imgToBitmap/main.go
index f6179ea..0d6d8a4 100644
--- a/examples/bitmap/imgToBitmap/main.go
+++ b/examples/bitmap/imgToBitmap/main.go
@@ -1,14 +1,22 @@
+//go:build go1.16
+// +build go1.16
+
 package main
 
 import (
+	_ "embed"
 	"fmt"
 
 	"github.com/go-vgo/robotgo"
 	"github.com/vcaesar/imgo"
 )
 
+//go:embed test_007.jpeg
+var testPng []byte
+
 func main() {
 	bit1 := robotgo.CaptureScreen(300, 300, 100, 100)
+	defer robotgo.FreeBitmap(bit1)
 	robotgo.SaveBitmap(bit1, "test_003.jpeg")
 
 	m1 := robotgo.ToImage(bit1)
@@ -20,4 +28,25 @@ func main() {
 
 	bit2 := robotgo.ToCBitmap(robotgo.ImgToBitmap(m1))
 	robotgo.SaveBitmap(bit2, "test_002.jpeg")
+
+	test()
+}
+
+func test() {
+	bitmap := robotgo.CaptureScreen(10, 10, 10, 10)
+	defer robotgo.FreeBitmap(bitmap)
+
+	img := robotgo.ToImage(bitmap)
+	robotgo.SavePng(img, "test_1.png")
+
+	img1, _ := robotgo.ByteToImg(testPng)
+	robotgo.SaveJpeg(img1, "test_7.jpeg")
+
+	bit2 := robotgo.ToCBitmap(robotgo.ImgToBitmap(img))
+	fx, fy := robotgo.FindBitmap(bit2)
+	fmt.Println("FindBitmap------ ", fx, fy)
+
+	arr := robotgo.FindEveryBitmap(bit2)
+	fmt.Println("Find every bitmap: ", arr)
+	robotgo.SaveBitmap(bitmap, "test.png")
 }
diff --git a/examples/bitmap/imgToBitmap/test_007.jpeg b/examples/bitmap/imgToBitmap/test_007.jpeg
new file mode 100644
index 0000000..0823de1
Binary files /dev/null and b/examples/bitmap/imgToBitmap/test_007.jpeg differ
diff --git a/go.mod b/go.mod
index 56fa8ac..7cf0e86 100644
--- a/go.mod
+++ b/go.mod
@@ -1,20 +1,33 @@
 module github.com/go-vgo/robotgo
 
+go 1.17
+
 require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/lxn/win v0.0.0-20210218163916-a377121e959e
-	github.com/otiai10/curr v1.0.0 // indirect
 	github.com/otiai10/gosseract v2.2.1+incompatible
 	github.com/robotn/gohook v0.31.1
 	github.com/robotn/xgb v0.0.0-20190912153532-2cb92d044934
 	github.com/robotn/xgbutil v0.0.0-20190912154524-c861d6f87770
-	github.com/vcaesar/gops v0.21.1
+	github.com/vcaesar/gops v0.21.2
 	github.com/vcaesar/imgo v0.20.0
 	github.com/vcaesar/tt v0.11.0
 	golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d
 	golang.org/x/net v0.0.0-20201110031124-69a78807bb2b // indirect
 )
 
+require (
+	github.com/StackExchange/wmi v1.2.1 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-ole/go-ole v1.2.5 // indirect
+	github.com/otiai10/mint v1.3.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/shirou/gopsutil v3.21.8+incompatible // indirect
+	github.com/tklauser/go-sysconf v0.3.9 // indirect
+	github.com/tklauser/numcpus v0.3.0 // indirect
+	golang.org/x/sys v0.0.0-20210915083310-ed5796bab164 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+)
+
 // replace golang.org/x/sys => github.com/golang/sys v0.0.0-20190109145017-48ac38b7c8cb
 
-go 1.13
+// go 1.13
diff --git a/go.sum b/go.sum
index 7f4a1fa..402ddca 100644
--- a/go.sum
+++ b/go.sum
@@ -10,8 +10,6 @@ github.com/go-ole/go-ole v1.2.5/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiU
 github.com/lxn/win v0.0.0-20210218163916-a377121e959e h1:H+t6A/QJMbhCSEH5rAuRxh+CtW96g0Or0Fxa9IKr4uc=
 github.com/lxn/win v0.0.0-20210218163916-a377121e959e/go.mod h1:KxxjdtRkfNoYDCUP5ryK7XJJNTnpC8atvtmTheChOtk=
 github.com/otiai10/curr v0.0.0-20150429015615-9b4961190c95/go.mod h1:9qAhocn7zKJG+0mI8eUu6xqkFDYS2kb2saOteoSB3cE=
-github.com/otiai10/curr v1.0.0 h1:TJIWdbX0B+kpNagQrjgq8bCMrbhiuX73M2XwgtDMoOI=
-github.com/otiai10/curr v1.0.0/go.mod h1:LskTG5wDwr8Rs+nNQ+1LlxRjAtTZZjtJW4rMXl6j4vs=
 github.com/otiai10/gosseract v2.2.1+incompatible h1:Ry5ltVdpdp4LAa2bMjsSJH34XHVOV7XMi41HtzL8X2I=
 github.com/otiai10/gosseract v2.2.1+incompatible/go.mod h1:XrzWItCzCpFRZ35n3YtVTgq5bLAhFIkascoRo8G32QE=
 github.com/otiai10/mint v1.3.0 h1:Ady6MKVezQwHBkGzLFbrsywyp09Ah7rkmfjV3Bcr5uc=
@@ -24,18 +22,17 @@ github.com/robotn/xgb v0.0.0-20190912153532-2cb92d044934 h1:2lhSR8N3T6I30q096DT7
 github.com/robotn/xgb v0.0.0-20190912153532-2cb92d044934/go.mod h1:SxQhJskUJ4rleVU44YvnrdvxQr0tKy5SRSigBrCgyyQ=
 github.com/robotn/xgbutil v0.0.0-20190912154524-c861d6f87770 h1:2uX8QRLkkxn2EpAQ6I3KhA79BkdRZfvugJUzJadiJwk=
 github.com/robotn/xgbutil v0.0.0-20190912154524-c861d6f87770/go.mod h1:svkDXUDQjUiWzLrA0OZgHc4lbOts3C+uRfP6/yjwYnU=
-github.com/shirou/gopsutil v3.21.7+incompatible h1:g/wcPHcuCQvHSePVofjQljd2vX4ty0+J6VoMB+NPcdk=
-github.com/shirou/gopsutil v3.21.7+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
+github.com/shirou/gopsutil v3.21.8+incompatible h1:sh0foI8tMRlCidUJR+KzqWYWxrkuuPIGiO6Vp+KXdCU=
+github.com/shirou/gopsutil v3.21.8+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/tklauser/go-sysconf v0.3.8 h1:41Nq9J+pxKud4IQ830J5LlS5nl67dVQC7AuisUooaOU=
-github.com/tklauser/go-sysconf v0.3.8/go.mod h1:z4zYWRS+X53WUKtBcmDg1comV3fPhdQnzasnIHUoLDU=
-github.com/tklauser/numcpus v0.2.3/go.mod h1:vpEPS/JC+oZGGQ/My/vJnNsvMDQL6PwOqt8dsCw5j+E=
+github.com/tklauser/go-sysconf v0.3.9 h1:JeUVdAOWhhxVcU6Eqr/ATFHgXk/mmiItdKeJPev3vTo=
+github.com/tklauser/go-sysconf v0.3.9/go.mod h1:11DU/5sG7UexIrp/O6g35hrWzu0JxlwQ3LSFUzyeuhs=
 github.com/tklauser/numcpus v0.3.0 h1:ILuRUQBtssgnxw0XXIjKUC56fgnOrFoQQ/4+DeU2biQ=
 github.com/tklauser/numcpus v0.3.0/go.mod h1:yFGUr7TUHQRAhyqBcEg0Ge34zDBAsIvJJcyE6boqnA8=
-github.com/vcaesar/gops v0.21.1 h1:a8ZCbho+K3RP1+hlkGCSWih84Iu3hjXYKwZW3970hkg=
-github.com/vcaesar/gops v0.21.1/go.mod h1:upqQTBNSvazU+AvHwXY7VPdJscLoOqOxw+vkmJKnjEk=
+github.com/vcaesar/gops v0.21.2 h1:OwWoJR0zb+AK41TN2adhZUP9lAmaRMzkWwf7Ux5Mx00=
+github.com/vcaesar/gops v0.21.2/go.mod h1:BEJGigAc9GORbEegWX9rRon/qwibjDs8p50WYm2KlXw=
 github.com/vcaesar/imgo v0.20.0 h1:lX7a2vygTri0Z3VYpwoQA2LPvbphFyT5ON4NTqdC4wQ=
 github.com/vcaesar/imgo v0.20.0/go.mod h1:eJscuTEdc6sVn/hZruy8kWi61xqKHLtbAYyPeYcn+t4=
 github.com/vcaesar/tt v0.11.0 h1:obQecjgbnAxxC6OYGY6yDvhGRW2PR5wD8Ma2uJH3WGA=
@@ -52,15 +49,14 @@ golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190916202348-b4ddaad3f8a3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201018230417-eeed37f84f13/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210816074244-15123e1e1f71/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210820121016-41cdb8703e55 h1:rw6UNGRMfarCepjI8qOepea/SXwIBVfTKjztZ5gBbq4=
-golang.org/x/sys v0.0.0-20210820121016-41cdb8703e55/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210915083310-ed5796bab164 h1:7ZDGnxgHAMw7thfC5bEos0RDAccZKxioiWBhfIe+tvw=
+golang.org/x/sys v0.0.0-20210915083310-ed5796bab164/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/robotgo.go b/robotgo.go
index 08ab002..5ac3edd 100644
--- a/robotgo.go
+++ b/robotgo.go
@@ -63,6 +63,7 @@ import (
 	"unsafe"
 
 	// "syscall"
+	"math/rand"
 	"os/exec"
 
 	"github.com/go-vgo/robotgo/clipboard"
@@ -697,6 +698,23 @@ func KeyToggle(key string, args ...string) string {
 	return C.GoString(str)
 }
 
+// KeyPress press key string
+func KeyPress(key string) {
+	KeyDown(key)
+	Sleep(15 + rand.Intn(10))
+	KeyUp(key)
+}
+
+// KeyDown press down a key
+func KeyDown(key string) {
+	KeyToggle(key, "down")
+}
+
+// KeyUp press up a key
+func KeyUp(key string) {
+	KeyToggle(key, "up")
+}
+
 // ReadAll read string from clipboard
 func ReadAll() (string, error) {
 	return clipboard.ReadAll()
diff --git a/robotgo_mac_win.go b/robotgo_mac_win.go
index 53d7541..de6d21a 100644
--- a/robotgo_mac_win.go
+++ b/robotgo_mac_win.go
@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+//go:build darwin || windows
 // +build darwin windows
 
 package robotgo
diff --git a/robotgo_ocr.go b/robotgo_ocr.go
index 6e1939f..b931a85 100644
--- a/robotgo_ocr.go
+++ b/robotgo_ocr.go
@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+//go:build ocr
 // +build ocr
 
 package robotgo
diff --git a/robotgo_test.go b/robotgo_test.go
index cce772a..9eb2de8 100644
--- a/robotgo_test.go
+++ b/robotgo_test.go
@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+//go:build darwin || windows
 // +build darwin windows
 
 package robotgo
diff --git a/robotgo_unix.go b/robotgo_unix.go
index 1463e75..009c9d4 100644
--- a/robotgo_unix.go
+++ b/robotgo_unix.go
@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+//go:build !darwin && !windows
 // +build !darwin,!windows
 
 package robotgo
diff --git a/robotgo_win.go b/robotgo_win.go
index eac9a9d..46a3808 100644
--- a/robotgo_win.go
+++ b/robotgo_win.go
@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+//go:build windows
 // +build windows
 
 package robotgo