diff --git a/Cargo.lock b/Cargo.lock
index 725bc05..51133ab 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -121,6 +121,15 @@ version = "0.2.127"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "505e71a4706fa491e9b1b55f51b95d4037d0821ee40131190475f692b35b009b"
 
+[[package]]
+name = "log"
+version = "0.4.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "once_cell"
 version = "1.13.0"
@@ -274,6 +283,7 @@ name = "tik"
 version = "0.1.0"
 dependencies = [
  "clap",
+ "log",
  "serde",
  "serde_json",
  "xdg",
diff --git a/Cargo.toml b/Cargo.toml
index 54cc653..80854e2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,6 +7,7 @@ edition = "2021"
 
 [dependencies]
 clap = { version = "3.2.16", default-features = false, features = ["derive", "std"] }
+log = "0.4.17"
 serde = { version = "1.0.142", features = ["derive"] }
 serde_json = "1.0.83"
 xdg = "2.4.1"
diff --git a/src/cli.rs b/src/cli.rs
index c163542..18a5962 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -10,7 +10,12 @@ pub struct Args {
 #[derive(Parser)]
 pub enum SubCommand {
     List,
-    Start,
+    Start {
+        #[clap(short, long)]
+        open: bool,
+
+        idx: Option<usize>,
+    },
     Pause,
     Finish,
     Status,
diff --git a/src/main.rs b/src/main.rs
index 6fcb52b..26db63c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -18,13 +18,15 @@ fn main() {
         .map(|file| serde_json::from_reader(file).unwrap())
         .unwrap_or_default();
 
+    let current_task_info_file_path = xdg_dirs.place_data_file("current.json").unwrap();
+    let mut current_task_info: Option<CurrentTaskInfo> =
+        std::fs::File::open(&current_task_info_file_path)
+            .map(|file| serde_json::from_reader(file).unwrap())
+            .unwrap_or_default();
+
     match args.command {
         cli::SubCommand::Add { link, name } => {
-            tasks.push(Task {
-                name,
-                link,
-                description: None,
-            });
+            tasks.push(Task { name, link });
 
             let mut file = std::fs::File::create(&tasks_file_path).unwrap();
             file.write_all(&serde_json::to_vec(&tasks).unwrap())
@@ -39,7 +41,7 @@ fn main() {
             no_link,
         } => {
             if idx == 0 || idx > tasks.len() {
-                println!("invalid index");
+                panic!("invalid index");
             }
 
             let mut task = &mut tasks[idx - 1];
@@ -60,7 +62,7 @@ fn main() {
         }
         cli::SubCommand::Remove { idx } => {
             if idx == 0 || idx > tasks.len() {
-                println!("invalid index");
+                panic!("invalid index");
             }
 
             println!("You are deleting task:");
@@ -90,7 +92,14 @@ fn main() {
         }
         cli::SubCommand::List => {
             for (i, task) in tasks.iter().enumerate() {
-                print!("{}. ", i + 1);
+                let idx = i + 1;
+
+                match current_task_info {
+                    Some(CurrentTaskInfo { task_idx, .. }) if task_idx == idx => print!("> "),
+                    _ => print!("  "),
+                }
+
+                print!("{}. ", idx);
                 if task.link.is_some() {
                     print!("(link) ");
                 }
@@ -102,7 +111,7 @@ fn main() {
             priority,
         } => {
             if target_idx == 0 || target_idx > tasks.len() {
-                println!("invalid index");
+                panic!("invalid index");
             }
 
             let idx = match priority {
@@ -115,7 +124,7 @@ fn main() {
                 }
             };
             if idx == 0 || idx > tasks.len() {
-                println!("invalid index");
+                panic!("invalid index");
             }
 
             let target = tasks.remove(target_idx - 1);
@@ -123,11 +132,9 @@ fn main() {
             match priority {
                 cli::Priority::Before { .. } => {
                     tasks.insert(idx - 1, target);
-                    println!("{} < {}", target_idx, idx);
                 }
                 cli::Priority::After { .. } => {
                     tasks.insert(idx, target);
-                    println!("{} > {}", target_idx, idx);
                 }
             }
 
@@ -135,13 +142,39 @@ fn main() {
             file.write_all(&serde_json::to_vec(&tasks).unwrap())
                 .unwrap();
         }
-        cli::SubCommand::Start => {
+        cli::SubCommand::Start { idx, open } => {
+            let idx = idx.unwrap_or(1);
+            if idx == 0 || idx > tasks.len() {
+                panic!("invalid index");
+            }
+            let task = &tasks[idx - 1];
+
+            current_task_info.replace(CurrentTaskInfo {
+                task_idx: idx,
+                task: task.clone(),
+            });
+
+            let mut file = std::fs::File::create(&current_task_info_file_path).unwrap();
+            file.write_all(&serde_json::to_vec(&current_task_info).unwrap())
+                .unwrap();
+            println!("started");
+
+            if let (Some(link), true) = (task.link.as_ref(), open) {
+                log::debug!("opening link...");
+                std::process::Command::new("xdg-open")
+                    .arg(link)
+                    .spawn()
+                    .expect("failed to start");
+                log::debug!("opened");
+            }
+
+            /*
             println!("starting...");
             println!("-- on start hook found");
             println!("-- running...");
             println!("> curl ...");
             println!("-- status was changed to \"In progress\" successfuly");
-            println!("started");
+            */
         }
         cli::SubCommand::Pause => {
             println!("pausing...");
@@ -171,10 +204,16 @@ fn main() {
     }
 }
 
-#[derive(Deserialize, Serialize)]
+#[derive(Deserialize, Serialize, Clone)]
 struct Task {
     name: String,
     link: Option<String>,
-    description: Option<String>,
     // created_at
 }
+
+#[derive(Deserialize, Serialize)]
+struct CurrentTaskInfo {
+    task_idx: usize,
+    task: Task,
+    // started_at
+}