diff --git a/Arduino/12_LED_EFFECTS/12_LED_EFFECT_3.ino b/Arduino/12_LED_EFFECTS/12_LED_EFFECT_3.ino
index e69de29..6b17c66 100644
--- a/Arduino/12_LED_EFFECTS/12_LED_EFFECT_3.ino
+++ b/Arduino/12_LED_EFFECTS/12_LED_EFFECT_3.ino
@@ -0,0 +1,576 @@
+#define t   30
+
+#define t1  20
+
+#define t2  100
+
+#define t3  50
+
+
+void setup() {
+
+  // set up pins 2 to 13 as outputscf
+
+  for (int i = 2; i <= 13; i++) {
+
+    pinMode(i, OUTPUT);
+
+  }
+
+}
+
+void loop(){
+
+
+effect_1();
+
+effect_1();
+
+
+ effect_2();
+
+ effect_2();
+
+
+ effect_3();
+
+ effect_3();
+
+
+ effect_4();
+
+ effect_4();
+
+
+ effect_5();
+
+ effect_5();
+
+
+ effect_6();
+
+ effect_6();
+
+
+ effect_7();
+
+ effect_7();
+
+  }
+
+//left to right and right to left
+
+void effect_1()
+
+{
+
+for(int i=2; i<14; i++){
+
+digitalWrite(i, HIGH);
+
+delay(t1);
+
+digitalWrite(i+1, HIGH);
+
+delay(t1);
+
+digitalWrite(i+2, HIGH);
+
+delay(t1);
+
+digitalWrite(i, LOW);
+
+delay(t1);
+
+digitalWrite(i+1, LOW);
+
+delay(t1);
+
+}
+
+for(int i=13; i>1; i--){
+
+digitalWrite(i, HIGH);
+
+delay(t1);
+
+digitalWrite(i-1, HIGH);
+
+delay(t1);
+
+digitalWrite(i-2, HIGH);
+
+delay(t1);
+
+digitalWrite(i, LOW);
+
+delay(t1);
+
+digitalWrite(i-1, LOW);
+
+delay(t1);
+
+}
+
+}
+
+void effect_2()
+
+{
+
+int count = 13; // keeps track of second LED movement
+
+
+  // move first LED from left to right and second from right to left
+
+  for (int i = 2; i < 13; i++) {
+
+    clear();
+
+    digitalWrite(i, HIGH);      // chaser 1
+
+    digitalWrite(count, HIGH); // chaser 2
+
+    count--;
+
+    // stop LEDs from appearing to stand still in the middle
+
+    if (count != 7) {
+
+      delay(t2);
+
+    }
+
+  }
+
+
+  // move first LED from right to left and second LED from left to right
+
+  for (int i = 13; i > 2; i--) {
+
+    clear();
+
+    digitalWrite(i, HIGH);      // chaser 1
+
+    digitalWrite(count, HIGH); // chaser 2
+
+    count++;
+
+    // stop LEDs from appearing to stand still in the middle
+
+    if (count != 8) {
+
+      delay(t2);
+
+    }
+
+  }
+
+}
+
+
+
+void effect_3()
+
+{
+
+for(int i=2; i<14; i++){
+
+  digitalWrite(i, HIGH);
+
+  delay(t3);
+
+}
+
+for(int i=2; i<14; i++){
+
+  digitalWrite(i, LOW);
+
+  delay(t3);
+
+}
+
+
+
+for(int i = 14; i>=2; i--){
+
+  digitalWrite(i, HIGH);
+
+  delay(t3);
+
+}
+
+for(int i = 14; i>=2; i--){
+
+  digitalWrite(i, LOW);
+
+  delay(t3);
+
+}
+
+}
+
+void effect_4()
+
+{
+
+for(int j = 2; j <= 13; j++){
+
+  digitalWrite(j, HIGH);
+
+  delay(t2);
+
+  j=j+1;
+
+  }
+
+for(int j = 2; j <= 13; j++){
+
+  digitalWrite(j, LOW);
+
+  delay(t2);
+
+  }
+
+
+  for(int k = 15; k > 2; k--){
+
+  digitalWrite(k, HIGH);
+
+  delay(t2);
+
+  k=k-1;
+
+  }
+
+for(int k = 15; k > 2; k--){
+
+  digitalWrite(k, LOW);
+
+  delay(t2);
+
+  }
+
+}
+
+  void effect_5()
+
+{
+
+ for(int pin = 13; pin >= 2; pin--)
+
+  {
+
+  digitalWrite(pin, HIGH);
+
+  delay(t1);
+
+  digitalWrite(pin+1, LOW);
+
+  delay(t1);
+
+  }
+
+  for(int pin = 13; pin >= 2; pin--)
+
+  {
+
+  digitalWrite(pin+1, HIGH);
+
+  delay(t1);
+
+  digitalWrite(pin+2, LOW);
+
+  delay(t1);
+
+  }
+
+  for(int pin = 13; pin >= 2; pin--)
+
+  {
+
+  digitalWrite(pin+2, HIGH);
+
+  delay(t1);
+
+  digitalWrite(pin+3, LOW);
+
+  delay(t1);
+
+  }
+
+  for(int pin = 13; pin >= 2; pin--)
+
+  {
+
+  digitalWrite(pin+3, HIGH);
+
+  delay(t1);
+
+  digitalWrite(pin+4, LOW);
+
+  delay(t1);
+
+  }
+
+    for(int pin = 13; pin >= 2; pin--)
+
+  {
+
+  digitalWrite(pin+4, HIGH);
+
+  delay(t1);
+
+  digitalWrite(pin+5, LOW);
+
+  delay(t1);
+
+  }
+
+  for(int pin = 13; pin >= 2; pin--)
+
+  {
+
+  digitalWrite(pin+5, HIGH);
+
+  delay(t1);
+
+  digitalWrite(pin+6, LOW);
+
+  delay(t1);
+
+  }
+
+  for(int pin = 13; pin >= 2; pin--)
+
+  {
+
+  digitalWrite(pin+6, HIGH);
+
+  delay(t1);
+
+  digitalWrite(pin+7, LOW);
+
+  delay(t1);
+
+  }
+
+   for(int pin = 13; pin >= 2; pin--)
+
+  {
+
+  digitalWrite(pin+7, HIGH);
+
+  delay(t1);
+
+  digitalWrite(pin+8, LOW);
+
+  delay(t1);
+
+  }
+
+  for(int pin = 9; pin >= 2; pin--)
+
+  {
+
+  digitalWrite(pin+8, HIGH);
+
+  delay(t1);
+
+  digitalWrite(pin+9, LOW);
+
+  delay(t1);
+
+  }
+
+    for(int pin = 9; pin >= 2; pin--)
+
+  {
+
+  digitalWrite(pin+9, HIGH);
+
+  delay(t1);
+
+  digitalWrite(pin+10, LOW);
+
+  delay(t1);
+
+  }
+
+  for(int pin = 9; pin >= 2; pin--)
+
+  {
+
+  digitalWrite(pin+10, HIGH);
+
+  delay(t1);
+
+  digitalWrite(pin+11, LOW);
+
+  delay(t1);
+
+  }
+
+  for(int pin = 14; pin >= 2; pin--)
+
+  {
+
+  digitalWrite(pin+11, HIGH);
+
+  delay(t1);
+
+  }
+
+  for(int pin = 13; pin >= 2; pin--)
+
+  {
+
+    digitalWrite(pin, LOW);
+
+  delay(t1);
+
+    }
+
+  }
+
+void effect_6()
+
+{
+
+for(int j=2; j<14; j++){
+
+
+  digitalWrite(j, LOW);
+
+  delay(t);
+
+  digitalWrite(j, HIGH);
+
+  delay(t);
+
+  digitalWrite(j-2, LOW);
+
+  delay(t);
+
+  digitalWrite(j, HIGH);
+
+}
+
+for(int k = 15; k>2; k--){
+
+  digitalWrite(k, LOW);
+
+  delay(t);
+
+  digitalWrite(k, HIGH);
+
+  delay(t);
+
+  digitalWrite(k+2, LOW);
+
+  delay(t);
+
+  digitalWrite(k, HIGH);
+
+}
+
+for(int k = 2; k<14; k++){
+
+  digitalWrite(k, LOW);
+
+  delay(t);
+
+  digitalWrite(k, HIGH);
+
+  delay(t);
+
+  digitalWrite(k-2, LOW);
+
+  delay(t);
+
+  digitalWrite(k, HIGH);
+
+}
+
+for(int k = 15; k>2; k--){
+
+  digitalWrite(k, LOW);
+
+  delay(t);
+
+  digitalWrite(k, HIGH);
+
+  delay(t);
+
+  digitalWrite(k+4, LOW);
+
+  delay(t);
+
+  digitalWrite(k, HIGH);
+
+}
+
+for(int k = 2; k<14; k++){
+
+  digitalWrite(k, LOW);
+
+  delay(t);
+
+  digitalWrite(k, HIGH);
+
+  delay(t);
+
+  digitalWrite(k-4, LOW);
+
+  delay(t);
+
+  digitalWrite(k, HIGH);
+
+} 
+
+}
+
+void effect_7()
+
+{
+
+for(int j=2; j<14; j++){
+
+  digitalWrite(j, HIGH);
+
+  delay(t);
+
+  digitalWrite(j+2, LOW);
+
+  delay(t);
+
+}
+
+for(int k = 15; k>2; k--){
+
+  digitalWrite(k, HIGH);
+
+  delay(t);
+
+  digitalWrite(k+2, LOW);
+
+  delay(t);
+
+}
+
+}
+
+
+// function to switch all LEDs off
+
+void clear(void)
+
+{
+
+  for (int i = 2; i <= 13; i++) {
+
+    digitalWrite(i, LOW);
+
+  }
+
+}
\ No newline at end of file
diff --git a/Visual Studio Code Projects/Day-48/main.py b/Visual Studio Code Projects/Day-48/main.py
new file mode 100644
index 0000000..e69de29