diff --git a/README.md b/README.md
index 736c59a..07bd957 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,25 @@
 # wtt
 Work Time Tracker - console time tracking app
+
+
+### Use
+Create new project
+```
+./wtt new ProjectName
+```
+
+
+Start working on a project
+```
+./wtt start ProjectName
+```
+
+Stop working on the current project
+```
+./wtt stop
+```
+
+List projects
+```
+./wtt list
+```
diff --git a/errors.go b/errors.go
new file mode 100755
index 0000000..e997ec1
--- /dev/null
+++ b/errors.go
@@ -0,0 +1,9 @@
+package main
+
+import "log"
+
+func check(err error) {
+	if err != nil {
+		log.Println(err)
+	}
+}
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..8e43d9f
--- /dev/null
+++ b/main.go
@@ -0,0 +1,97 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/user"
+	"time"
+
+	"github.com/fatih/color"
+)
+
+var directoryPath string
+var filePath string
+
+func main() {
+	usr, err := user.Current()
+	if err != nil {
+		log.Fatal(err)
+	}
+	directoryPath = usr.HomeDir + "/.wtt"
+	filePath = directoryPath + "/work.json"
+	readProjects()
+
+	//get the command line parameters
+	if len(os.Args) > 1 {
+		switch os.Args[1] {
+		case "new":
+			//create project os.Args[2]
+			if len(os.Args) > 2 {
+				projectName := os.Args[2]
+				color.Green("creating new project: " + projectName)
+				err := newProject(projectName)
+				if err != nil {
+					break
+				}
+				saveWork()
+			} else {
+				color.Red("No project name specified")
+			}
+			break
+		case "list":
+			//list projects
+			listProjects()
+			break
+		case "start":
+			//check if already there is any project started
+			if work.CurrentProjectName != "" {
+				color.Red("Can not start project, already project " + work.CurrentProjectName + " running")
+				break
+			}
+			//start project os.Args[2]
+			if len(os.Args) > 2 {
+				projectName := os.Args[2]
+				i := getProjectIByName(projectName)
+				if i < 0 {
+					color.Red("Project name: " + projectName + ", no exists")
+					break
+				}
+				var newStreak Streak
+				newStreak.Start = time.Now()
+				work.Projects[i].Streaks = append(work.Projects[i].Streaks, newStreak)
+				work.CurrentProjectName = projectName
+				saveWork()
+				fmt.Println("starting to work in project " + work.Projects[i].Name)
+			}
+			break
+		case "stop":
+			if work.CurrentProjectName == "" {
+				color.Red("no project started to stop")
+				break
+			}
+			i := getProjectIByName(work.CurrentProjectName)
+			if i < 0 {
+				color.Red("Project name: " + work.CurrentProjectName + ", no exists")
+				break
+			}
+			j := len(work.Projects[i].Streaks) - 1
+			work.Projects[i].Streaks[j].End = time.Now()
+			work.Projects[i].Streaks[j].Duration = time.Now().Sub(work.Projects[i].Streaks[j].Start)
+			work.CurrentProjectName = ""
+			saveWork()
+			fmt.Print("Worked ")
+			fmt.Print(work.Projects[i].Streaks[j].Duration)
+			fmt.Println(" in the project " + work.Projects[i].Name)
+
+			//stop project os.Args[2]
+			break
+		default:
+			color.Red("no option selected")
+			os.Exit(1)
+		}
+	} else {
+		color.Red("no option selected")
+		os.Exit(1)
+	}
+}
diff --git a/work.go b/work.go
new file mode 100644
index 0000000..da3a7f0
--- /dev/null
+++ b/work.go
@@ -0,0 +1,98 @@
+package main
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strconv"
+	"time"
+
+	"github.com/fatih/color"
+)
+
+type Project struct {
+	Name    string   `json:"name"`
+	Streaks []Streak `json:"streaks"`
+}
+type Streak struct {
+	Start       time.Time     `json:"start"`
+	End         time.Time     `json:"end"`
+	Duration    time.Duration `json:"duration"`
+	Description string        `json:"description"`
+}
+type Work struct {
+	Projects           []Project `json:"projects"`
+	CurrentProjectName string    `json:"currentProjectName"`
+}
+
+var work Work
+
+func readProjects() {
+	file, err := ioutil.ReadFile(filePath)
+	if err != nil {
+		//file not exists, create directory and file
+		color.Yellow(directoryPath + " not exists, creating directory")
+		_ = os.Mkdir(directoryPath, os.ModePerm)
+		saveWork()
+	}
+	content := string(file)
+	json.Unmarshal([]byte(content), &work)
+}
+
+func saveWork() {
+
+	jsonProjects, err := json.Marshal(work)
+	check(err)
+	err = ioutil.WriteFile(filePath, jsonProjects, 0644)
+	check(err)
+}
+func getProjectIByName(name string) int {
+	for i, project := range work.Projects {
+		if project.Name == name {
+			return i
+		}
+	}
+	return -1
+}
+func projectExist(name string) bool {
+	for _, project := range work.Projects {
+		if project.Name == name {
+			return true
+		}
+	}
+	return false
+}
+func newProject(name string) error {
+	//first, check if the project name is not taken yet
+	if projectExist(name) {
+		color.Red("Project name: " + name + ", already exists")
+		return errors.New("project name already exist")
+	}
+	var newProject Project
+	newProject.Name = name
+	work.Projects = append(work.Projects, newProject)
+	return nil
+}
+func listProjects() {
+	fmt.Println("")
+	fmt.Println("")
+	fmt.Println("Listing projects")
+	fmt.Println("")
+	for k, project := range work.Projects {
+		fmt.Println("project " + strconv.Itoa(k))
+		fmt.Print("name: ")
+		color.Blue(project.Name)
+		for k2, streak := range project.Streaks {
+			fmt.Println("	streak: " + strconv.Itoa(k2))
+			fmt.Print("	Start:")
+			fmt.Println(streak.Start)
+			fmt.Print("	End:")
+			fmt.Println(streak.End)
+			fmt.Print("	Duration:")
+			fmt.Println(streak.Duration)
+		}
+		fmt.Println("")
+	}
+}
diff --git a/wtt b/wtt
new file mode 100755
index 0000000..dcc10ad
Binary files /dev/null and b/wtt differ