diff --git a/headFirst/colors/go.mod b/headFirst/colors/go.mod
new file mode 100644
index 0000000..d07a929
--- /dev/null
+++ b/headFirst/colors/go.mod
@@ -0,0 +1,10 @@
+module main.go
+
+go 1.25.3
+
+require (
+	github.com/fatih/color v1.18.0 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	golang.org/x/sys v0.25.0 // indirect
+)
diff --git a/headFirst/colors/go.sum b/headFirst/colors/go.sum
new file mode 100644
index 0000000..33148a4
--- /dev/null
+++ b/headFirst/colors/go.sum
@@ -0,0 +1,11 @@
+github.com/fatih/color v1.18.0 h1:S8gINlzdQ840/4pfAwic/ZE0djQEH3wM94VfqLTZcOM=
+github.com/fatih/color v1.18.0/go.mod h1:4FelSpRwEGDpQ12mAdzqdOukCy4u8WUtOY6lkT/6HfU=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
+golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
diff --git a/headFirst/colors/main.go b/headFirst/colors/main.go
new file mode 100644
index 0000000..c2b5c88
--- /dev/null
+++ b/headFirst/colors/main.go
@@ -0,0 +1,48 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"sort"
+
+	_ "github.com/fatih/color"
+)
+
+func main() {
+	var buffer bytes.Buffer
+
+	// yellow := color.New(color.FgHiYellow).PrintFunc()
+	infos := map[string]string{
+		"front_addr":           "strings.Split(osdDevice.Info.FrontAddr,)[0]",
+		"ceph_release/version": "osdDevice.Info.CephRelease",
+		"cpu":                  "osdDevice.Info.CPU",
+		"hostname":             "osdDevice.Info.Hostname",
+		"default_device_class": "osdDevice.Info.DefaultDeviceClass",
+		"devices":              "osdDevice.Info.Devices",
+		"distro_description":   "osdDevice.Info.DistroDescription",
+		"journal_rotational":   "osdDevice.Info.JournalRotational",
+		"rotational":           "osdDevice.Info.Rotational",
+		"kernel_version":       "osdDevice.Info.KernelVersion",
+		"mem_swap_kb":          "osdDevice.Info.MemSwapKb",
+		"mem_total_kb":         "osdDevice.Info.MemTotalKb",
+		"osd_data":             "osdDevice.Info.OsdData",
+		"osd_objectstore":      "osdDevice.Info.OsdObjectstore",
+	}
+
+	buffer.WriteString(fmt.Sprintf("this is test"))
+
+	var infokeys []string
+
+	// _width := []int{0,0,0,0,0,0}
+
+	for k := range infos {
+		// fmt.Println(k)
+		infokeys = append(infokeys, k)
+	}
+
+	sort.Strings(infokeys)
+
+	for k,v := range infokeys {
+		fmt.Println(k,v)
+	}
+}