diff --git a/ShiftRegLeds/src/main.cpp b/ShiftRegLeds/src/main.cpp
index cb9fbba..e4c2c43 100644
--- a/ShiftRegLeds/src/main.cpp
+++ b/ShiftRegLeds/src/main.cpp
@@ -1,18 +1,34 @@
+// https://www.youtube.com/watch?v=n3qmQHzcgto&list=PLGs0VKk2DiYw-L-RibttcvK-WBZm8WLEP&index=42
+
 #include <Arduino.h>
 
-// put function declarations here:
-int myFunction(int, int);
+int latchPin = 11;
+int clockPin = 9;
+int dataPin = 12;
+
+int dt = 2500;
+byte LED1s = 0b10101010;
+byte LED2s = 0b01010101;
+
 
 void setup() {
   // put your setup code here, to run once:
-  int result = myFunction(2, 3);
+  Serial.begin(9600);
+  pinMode(latchPin, OUTPUT);
+  pinMode(clockPin, OUTPUT);
+  pinMode(dataPin, OUTPUT);
+
 }
 
 void loop() {
   // put your main code here, to run repeatedly:
-}
+  digitalWrite(latchPin, LOW);
+  shiftOut(dataPin, clockPin, LSBFIRST, LED1s);
+  digitalWrite(latchPin, HIGH);
+  delay(dt);
 
-// put function definitions here:
-int myFunction(int x, int y) {
-  return x + y;
-}
\ No newline at end of file
+  digitalWrite(latchPin, LOW);
+  shiftOut(dataPin, clockPin, LSBFIRST, LED2s);
+  digitalWrite(latchPin, HIGH);
+  delay(dt);
+}