diff --git a/01/app.js b/01/app.js
index 96dc2f5..a7830a1 100644
--- a/01/app.js
+++ b/01/app.js
@@ -1,2 +1,9 @@
 const randomNumber = Math.round(Math.random() * 20);
 console.log(randomNumber);
+
+if (randomNumber >= 5) {
+    for (i=5; i<randomNumber; i++)
+        console.log(i)
+} else (
+    console.log('Wylosowana liczba jest zbyt mała, aby użyć pętli')
+)
diff --git a/02/app.js b/02/app.js
index 8a41914..3fd74c9 100644
--- a/02/app.js
+++ b/02/app.js
@@ -1,2 +1,14 @@
 const x = 5;
-let result = 0;
\ No newline at end of file
+let result = 0;
+
+for (i = 1; i <= x; i++) {
+    result = result + i;
+}
+
+result = 0;
+let counter = 1;
+
+while (counter < x+1) {
+    result = result + counter;
+    counter++; 
+}
\ No newline at end of file
diff --git a/03/app.js b/03/app.js
index c26c886..fe77141 100644
--- a/03/app.js
+++ b/03/app.js
@@ -1,3 +1,9 @@
 const x = 10;
 let iteration = 0;
-let randomNumber = -1;
\ No newline at end of file
+let randomNumber = -1;
+
+while (randomNumber != x) {
+    randomNumber = Math.round(Math.random()*20);
+    iteration++;
+}
+console.log(iteration);