diff --git a/4_digits_led.py b/4_digits_led.py
new file mode 100644
index 0000000..1a8cddb
--- /dev/null
+++ b/4_digits_led.py
@@ -0,0 +1,105 @@
+from machine import Pin
+from time import sleep
+redLED01 = Pin(15, Pin.OUT)
+redLED02 = Pin(14, Pin.OUT)
+redLED03 = Pin(13, Pin.OUT)
+redLED04 = Pin(12, Pin.OUT)
+
+while True:
+    
+    redLED01.value(0)
+    redLED02.value(0)
+    redLED03.value(0)
+    redLED04.value(0)
+    sleep(1)
+    
+    redLED01.value(1)
+    redLED02.value(0)
+    redLED03.value(0)
+    redLED04.value(0)
+    sleep(1)
+    
+    redLED01.value(0)
+    redLED02.value(1)
+    redLED03.value(0)
+    redLED04.value(0)
+    sleep(1)
+    
+    redLED01.value(1)
+    redLED02.value(1)
+    redLED03.value(0)
+    redLED04.value(0)
+    sleep(1)
+    
+    redLED01.value(0)
+    redLED02.value(0)
+    redLED03.value(1)
+    redLED04.value(0)
+    sleep(1)
+    
+    redLED01.value(1)
+    redLED02.value(0)
+    redLED03.value(1)
+    redLED04.value(0)
+    sleep(1)
+    
+    redLED01.value(0)
+    redLED02.value(1)
+    redLED03.value(1)
+    redLED04.value(0)
+    sleep(1)
+    
+    redLED01.value(1)
+    redLED02.value(1)
+    redLED03.value(1)
+    redLED04.value(0)
+    sleep(1)
+    
+    redLED01.value(0)
+    redLED02.value(0)
+    redLED03.value(0)
+    redLED04.value(1)
+    sleep(1)
+    
+    redLED01.value(1)
+    redLED02.value(0)
+    redLED03.value(0)
+    redLED04.value(1)
+    sleep(1)
+    
+    redLED01.value(0)
+    redLED02.value(1)
+    redLED03.value(0)
+    redLED04.value(1)
+    sleep(1)
+    
+    redLED01.value(1)
+    redLED02.value(1)
+    redLED03.value(0)
+    redLED04.value(1)
+    sleep(1)
+    
+    redLED01.value(0)
+    redLED02.value(0)
+    redLED03.value(1)
+    redLED04.value(1)
+    sleep(1)
+    
+    redLED01.value(1)
+    redLED02.value(0)
+    redLED03.value(1)
+    redLED04.value(1)
+    sleep(1)
+    
+    redLED01.value(0)
+    redLED02.value(1)
+    redLED03.value(1)
+    redLED04.value(1)
+    sleep(1)
+    
+    redLED01.value(1)
+    redLED02.value(1)
+    redLED03.value(1)
+    redLED04.value(1)
+    sleep(1)
+    
diff --git a/analog_voltage.py b/analog_voltage.py
new file mode 100644
index 0000000..8987175
--- /dev/null
+++ b/analog_voltage.py
@@ -0,0 +1,13 @@
+import machine
+from time import sleep
+potPin = 28
+
+# Analog Digital convertor
+myPot = machine.ADC(potPin)
+
+while True:
+    # potVal is ranging from 0 to 2^16
+    potVal = myPot.read_u16()
+    potVoltage = (3.3 / 65536) * potVal
+    print("%.1f" % potVoltage)
+    sleep(.2)
\ No newline at end of file
diff --git a/board_led.py b/board_led.py
index 80847a7..69f54b8 100644
--- a/board_led.py
+++ b/board_led.py
@@ -4,5 +4,5 @@ led = machine.Pin("LED", machine.Pin.OUT)
 
 while True:
     led.toggle()
-    sleep(0.1)
+    sleep(10)
     
\ No newline at end of file
diff --git a/board_temp_sensor.py b/board_temp_sensor.py
new file mode 100644
index 0000000..4974bfe
--- /dev/null
+++ b/board_temp_sensor.py
@@ -0,0 +1,11 @@
+import machine
+import utime
+
+sensor_temp = machine.ADC(4)
+conversion_factor = 3.3 / (65535)
+
+while True:
+    reading = sensor_temp.read_u16() * conversion_factor
+    temperature = round(27 - (reading - 0.706)/0.001721, 2)
+    print("Temp: ", temperature)
+    utime.sleep(0.1)
\ No newline at end of file
diff --git a/light_up_led.py b/light_up_led.py
new file mode 100644
index 0000000..9dc7d46
--- /dev/null
+++ b/light_up_led.py
@@ -0,0 +1,9 @@
+from machine import Pin
+from time import sleep
+redLED01 = Pin(15, Pin.OUT)
+
+while True:
+    redLED01.value(0)
+    sleep(1)
+    redLED01.value(1)
+    sleep(2)
diff --git a/test.py b/test.py
new file mode 100644
index 0000000..f867592
--- /dev/null
+++ b/test.py
@@ -0,0 +1,7 @@
+from machine import Pin
+from time import sleep
+myLED = Pin('LED', Pin.OUT)
+
+while True:
+    myLED.toggle()
+    sleep(0.4)
\ No newline at end of file