diff --git a/kitronic_04.py b/kitronic_04.py
new file mode 100644
index 0000000..8b93fe4
--- /dev/null
+++ b/kitronic_04.py
@@ -0,0 +1,18 @@
+from microbit import *
+
+
+def main():
+    duty = 0
+    while True:
+        while duty < 1023:
+            pin0.write_analog(duty)
+            duty += 1
+            sleep(10)
+        while duty > 0:
+            pin0.write_analog(duty)
+            duty -= 1
+            sleep(10)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/kitronic_05.py b/kitronic_05.py
new file mode 100644
index 0000000..0369e5a
--- /dev/null
+++ b/kitronic_05.py
@@ -0,0 +1,11 @@
+from microbit import *
+
+
+def main():
+    while True:
+        value = min(1023, abs(accelerometer.get_y()))
+        pin0.write_analog(value)
+
+
+if __name__ == "__main__":
+    main()