diff --git a/index.js b/index.js
index 10f4784..89fbb4f 100644
--- a/index.js
+++ b/index.js
@@ -48,50 +48,257 @@ const player = {
     { id: 5, name: 'Israeli', songs: [4, 5] },
   ],
   playSong(song) {
-    console.log(/* your code here */)
+    console.log(`Playing ${song.title} from ${song.album} by ${song.artist} | ${durationConvert(song.duration)}.`)
   },
 }
 
+
+function durationConvert(duration)
+{
+  let min = Math.floor(duration / 60);
+  let sec = duration % 60;
+  
+  if (min < 10){
+    min = "0" + String(min);
+  }
+  if (sec < 10) {
+    sec = "0" + String(sec);
+  }
+  return min+':'+sec
+}
+
+
 function playSong(id) {
-  // your code here
+  for (let song of player.songs){
+    if (song.id === id)
+    {
+      return player.playSong(song);
+    }
+  }
+  throw new Error("This ID are not exist");
 }
 
+
+function getSongByID(id){
+  for (let index = 0; index < player.songs.length; index++) {
+    if(player.songs[index].id === id){
+      return player.songs[index];
+    }
+}
+throw new Error("This song are not exist")
+}
+
+
 function removeSong(id) {
-  // your code here
+  let songIndex=player.songs.indexOf(getSongByID(id))
+  player.songs.splice(songIndex,1);
+  for (let i=0; i<player.playlists.length; i++){
+    for (let j=0; j<player.playlists[i].songs.length; j++){
+      if (player.playlists[i].songs[j] === id)
+        player.playlists[i].songs.splice(j,1);
+    }
+  }
 }
 
+
 function addSong(title, album, artist, duration, id) {
-  // your code here
+  let newID=0;
+  let max=1;
+  if(id){
+  for (let index = 0; index < player.songs.length; index++) {
+    if(player.songs[index].id===id){
+      throw new Error("Sorry , this ID already taken") }}}
+    else {
+  for (let i = 0; i < player.songs.length; i++) {
+    if(player.songs[i].id>max){
+      max === player.songs[i].id;}
+  }
+  newID=max+1;
+} 
+  duration = duration.split(":");
+  duration = parseInt(duration[0] *60) + parseInt(duration[1]);
+  let newSong= {
+    id: id,
+    title: title,
+    album: album,
+    artist: artist,
+    duration: duration };
+    player.songs.push(newSong);
+    return newID;
 }
 
+
+function getPlaylistByID(id){
+  for (let index = 0; index < player.playlists.length; index++) {
+    if(player.playlists[index].id === id){
+      return player.playlists[index];
+    }
+}
+throw new Error("This playlist are not exist")
+}
+
+
 function removePlaylist(id) {
-  // your code here
+  let playlistIndex=getPlaylistByID(id);
+  player.playlists.splice(playlistIndex,1);
 }
 
+
 function createPlaylist(name, id) {
-  // your code here
+  let newP_ID=0
+  let maxP_ID=1
+  if(id){
+  for (let index = 0; index < player.playlists.length; index++) {
+    if(player.playlists[index].id===id){
+      throw new Error("Sorry , this ID already taken")
+    }
+ }
+ }
+else {
+  for (let i = 0; i < player.playlists.length; i++) {
+    if(player.playlists[i].id>maxP_ID){
+      maxP_ID === player.playlists[i].id;
+    }
+}
+newP_ID=maxP_ID;
+}
+  
+  let newPlaylist={
+    id:id,
+    name:name,
+    songs:[]
+  }
+  player.playlists.push(newPlaylist);
+  return newP_ID;
 }
 
+
 function playPlaylist(id) {
-  // your code here
+  let Pindex=getPlaylistByID(id);
+  for (let i = 0; i < Pindex.songs.length; i++) { 
+    playSong (Pindex.songs[i]);  
+  }
 }
 
+
+function indexSongInPlaylist( playlistId,songId) {
+  let playlist = getPlaylistByID(playlistId)
+  for (let index = 0; index < playlist.songs.length; index++) {
+    if (playlist.songs[index] == songId)
+      return index;
+  }
+  return -1;
+}
+
+
+function songExist(songId){
+  for(let i=0;i<player.songs.length;i++){
+    if(player.songs[i].id===songId){
+      return true;
+    }
+  }
+  return false;
+}
+
+
+function playlistExist(id) {
+  for (let i = 0; i < player.playlists.length; i++) {
+    if (player.playlists[i].id == id)
+      return true
+  }
+  return false
+}
+
+
 function editPlaylist(playlistId, songId) {
-  // your code here
+  let songIndex = indexSongInPlaylist(playlistId, songId)
+  let playlist = getPlaylistByID(playlistId)
+  if(songExist(songId) && playlistExist(playlistId)){
+    if(songIndex == -1){
+      playlist.songs.push(songId);
+    }
+    else if(playlist.songs.length > 1){
+      playlist.songs.splice(songIndex,1)
+    }
+    else{
+      removePlaylist(playlist.id)
+    }
+  }
+  else throw new Error("Somthing wrong");
 }
 
+
 function playlistDuration(id) {
-  // your code here
+  let allDuration=0;
+  let playlist=getPlaylistByID(id)
+  for(let i=0;i<playlist.songs.length;i++){
+    allDuration=allDuration + getSongByID(playlist.songs[i]).duration;
+  }
+  return allDuration;
 }
 
+
 function searchByQuery(query) {
-  // your code here
+  query=query.toLowerCase();
+  let obj={
+    songs:[],
+    playlists:[]
+  };
+  for (let song of player.songs)
+  {
+    if( (song.title.toLowerCase().includes(query)) || 
+        (song.album.toLowerCase().includes(query)) || 
+        (song.artist.toLowerCase().includes(query)) )
+    {
+      obj.songs.push(song);
+    }
+  }
+
+  for (let playlist of player.playlists)
+  {
+    if (playlist.name.toLowerCase().includes(query))
+    {
+      obj.playlists.push(playlist);
+    }
+  }
+  obj.songs.sort(function (a, b) {
+    if (a.title < b.title){
+       return -1; }
+    else if (a.title > b.title){
+       return 1; }
+    return 0;
+  })
+  return obj;
 }
 
 function searchByDuration(duration) {
-  // your code here
+  duration = duration.split(":");
+  duration = parseInt(duration[0] *60) + parseInt(duration[1]);
+
+  let closest = player.songs[0];
+  let defoultClosest = Math.abs(player.songs[0].duration - duration);
+
+  for (let i=0;i<player.songs.length;i++)
+  {
+    if ( Math.abs(player.songs[i].duration - duration) < defoultClosest  )
+    {
+      defoultClosest = Math.abs(player.songs[i].duration - duration);
+      closest = player.songs[i];
+    }
+  }
+  for (let j=0;j<player.playlists.length;j++)
+  {
+    if ( Math.abs(playlistDuration(player.playlists[j].id) - duration) < defoultClosest )
+    {
+      defoultClosest = (playlistDuration(player.playlists[j].id) - duration);
+      closest = player.playlists[j];
+    }
+  }
+  return closest
 }
 
+
+
 module.exports = {
   player,
   playSong,