diff --git a/01/app.js b/01/app.js
index 1c9992e..b57d1f8 100644
--- a/01/app.js
+++ b/01/app.js
@@ -1 +1,8 @@
-console.log('DOM');
\ No newline at end of file
+console.log('DOM');
+
+const elementList = document.querySelector('.comments__item.comments__item--newest');
+
+if(elementList !== null) {
+    const elementWithAttribute = elementList.querySelectorAll('[data-info]');
+    console.log("Liczba pasujących elementów:", elementWithAttribute.length);
+};
diff --git a/02/app.js b/02/app.js
index 1c9992e..cf1ab7d 100644
--- a/02/app.js
+++ b/02/app.js
@@ -1 +1,11 @@
-console.log('DOM');
\ No newline at end of file
+console.log('DOM');
+
+const linkList = document.querySelectorAll('[data-url]');
+
+if(linkList !== null) {
+    linkList.forEach(link => {
+        const url = link.getAttribute('data-url');
+        link.href = url;
+        console.log("Gotowe url:", link.href);
+    });
+};
\ No newline at end of file
diff --git a/03/app.js b/03/app.js
index c299ca3..c08e574 100644
--- a/03/app.js
+++ b/03/app.js
@@ -11,4 +11,21 @@ const buttonSettings = {
         color: '#444'
     },
     text: 'Click me!',
-}
\ No newline at end of file
+}
+
+
+const btn = document.createElement('button');
+btn.innerText = buttonSettings.text;
+
+for(let key in buttonSettings.attr) {
+    btn[key] = buttonSettings.attr[key]
+}
+
+for(let key in buttonSettings.css) {
+    btn.style[key] = buttonSettings.css[key];
+}
+
+console.log(btn);
+
+const buttonParent = document.querySelector('.parent-for-button');
+buttonParent.appendChild(btn);
\ No newline at end of file
diff --git a/04/app.js b/04/app.js
index e6411e4..476df3a 100644
--- a/04/app.js
+++ b/04/app.js
@@ -1,3 +1,4 @@
+
 console.log('DOM');
 
 // struktura do wykorzystania w pętli
@@ -5,4 +6,54 @@ const menuItems = [
     {text: 'start', url: '/'},
     {text: 'galeria', url: '/gallery'},
     {text: 'kontakt', url: '/contact'},
-];
\ No newline at end of file
+];
+
+/*
+const ul = document.createElement('ul');
+
+const liStart = document.createElement('li');
+ul.appendChild(liStart);
+
+const startA = document.createElement('a');
+startA.innerText = "Start";
+startA.href = "/";
+liStart.appendChild(startA);
+
+
+const liGallery = document.createElement('li');
+ul.appendChild(liGallery);
+
+const galleryA = document.createElement('a');
+galleryA.innerText = "Galeria";
+galleryA.href = "/gallery";
+liGallery.appendChild(galleryA);
+
+
+const liContact = document.createElement('li');
+ul.appendChild(liContact);
+
+const contactA = document.createElement('a');
+contactA.innerText = "Kontakt";
+contactA.href = "/contact";
+liContact.appendChild(contactA);
+console.log(ul);
+
+const nav = document.querySelector('nav');
+nav.appendChild(ul);
+*/
+
+
+const ul = document.createElement('ul');
+
+for(let menu of menuItems) {
+    const li = document.createElement('li');
+    const a = document.createElement('a');
+    a.innerText = menu.text;
+    a.href = menu.url;
+    li.appendChild(a);
+    ul.appendChild(li);
+}
+
+const nav = document.querySelector('nav');
+nav.appendChild(ul);
+console.log(ul);
diff --git a/05/app.js b/05/app.js
index 39abe5d..f09dc4f 100644
--- a/05/app.js
+++ b/05/app.js
@@ -1,3 +1,30 @@
 console.log('DOM');
 
 const curr = document.querySelector('.js-curr');
+
+const newBtn = document.createElement('button');
+newBtn.innerText = 'Usuń z koszyka';
+curr.after(newBtn);
+
+const parent = curr.parentElement;
+
+for(let child of parent.children) {
+    if( child !== curr) {
+        child.classList.add('siblings');
+    }
+}
+
+const nextArticle = parent.nextElementSibling;
+nextArticle.setAttribute('title', 'nextElementSibling');
+
+const lastArticle = nextArticle.nextElementSibling;
+const nextP = document.createElement('p');
+lastArticle.insertBefore(nextP, lastArticle.lastElementChild);
+
+
+const cloneArticle = parent.cloneNode(true);
+const section = parent.parentElement;
+section.insertBefore(cloneArticle, section.firstElementChild);
+
+console.log(section);
+