diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..6f3a291
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "liveServer.settings.port": 5501
+}
\ No newline at end of file
diff --git a/01/app.js b/01/app.js
index e69de29..fd795bb 100644
--- a/01/app.js
+++ b/01/app.js
@@ -0,0 +1,7 @@
+function showTime() {
+    console.log(time);
+}
+
+const time = (new Date()).toLocaleTimeString();
+
+showTime();
\ No newline at end of file
diff --git a/02/app.js b/02/app.js
index e69de29..7d20cc0 100644
--- a/02/app.js
+++ b/02/app.js
@@ -0,0 +1,7 @@
+function sayHello(name) {
+    console.log('Cześć ' + name);
+}
+
+const name = 'devmentor.pl';
+
+sayHello(name);
\ No newline at end of file
diff --git a/03/app.js b/03/app.js
index e69de29..f0f52ab 100644
--- a/03/app.js
+++ b/03/app.js
@@ -0,0 +1,9 @@
+const sumNumUpTo = function(number) {
+    let sum = 0;
+    for(let i=1; i<=number; i++) {
+        sum = sum + i;
+    }
+    return sum;
+}
+
+console.log(sumNumUpTo(4));
\ No newline at end of file
diff --git a/04/app.js b/04/app.js
index e69de29..4442201 100644
--- a/04/app.js
+++ b/04/app.js
@@ -0,0 +1,19 @@
+let counter = 0;
+
+function runTimer() {
+    const idInterval = setInterval(function() {
+        const time = (new Date()).toLocaleTimeString();
+        console.log(time);
+
+        counter++;
+        
+        if(counter === 5) {
+            clearInterval(idInterval);
+        }
+
+    }, 5000);
+}
+
+runTimer();
+
+