#include <Wire.h> 
 #include <LiquidCrystal_PCF8574.h> 
  
 LiquidCrystal_PCF8574 lcd(0x27);  // set the LCD address to 0x27 for a 16 chars and 2 line display 
  
 int show; 
  
 void setup() 
 { 
   int error; 
  
   Serial.begin(115200); 
   Serial.println("LCD..."); 
  
   while (! Serial); 
  
   Serial.println("Dose: check for LCD"); 
  
   // Seehttp://playground.arduino.cc/Main/I2cScanner 
   Wire.begin(); 
   Wire.beginTransmission(0x27); 
   error = Wire.endTransmission(); 
   Serial.print("Error: "); 
   Serial.print(error); 
  
   if (error == 0) { 
     Serial.println(": LCD found."); 
  
   } else { 
     Serial.println(": LCD not found."); 
   } // if 
  
   lcd.begin(16, 2); // initialize the lcd 
   show = 0; 
 } // setup() 
  
 void loop() 
 { 
   if (show == 0) { 
     lcd.setBacklight(255); 
     lcd.home(); lcd.clear(); 
     lcd.print("Hello LCD"); 
     delay(1000); 
  
     lcd.setBacklight(0); 
     delay(400); 
     lcd.setBacklight(255); 
  
   } else if (show == 1) { 
     lcd.clear(); 
     lcd.print("Cursor On"); 
     lcd.cursor(); 
  
   } else if (show == 2) { 
     lcd.clear(); 
     lcd.print("Cursor Blink"); 
     lcd.blink(); 
  
   } else if (show == 3) { 
     lcd.clear(); 
     lcd.print("Cursor OFF"); 
     lcd.noBlink(); 
     lcd.noCursor(); 
  
   } else if (show == 4) { 
     lcd.clear(); 
     lcd.print("Display Off"); 
     lcd.noDisplay(); 
  
   } else if (show == 5) { 
     lcd.clear(); 
     lcd.print("Display On"); 
     lcd.display(); 
  
   } else if (show == 7) { 
     lcd.clear(); 
     lcd.setCursor(0, 0); 
     lcd.print("*** first line."); 
     lcd.setCursor(0, 1); 
     lcd.print("*** second line."); 
  
   } else if (show == 8) { 
     lcd.scrollDisplayLeft(); 
   } else if (show == 9) { 
     lcd.scrollDisplayLeft(); 
   } else if (show == 10) { 
     lcd.scrollDisplayLeft(); 
   } else if (show == 11) { 
     lcd.scrollDisplayRight(); 
   } // if 
  
   delay(2000); 
   show = (show + 1) % 12; 
 } // loop() 
 

 
    //*Orjinali 8 ledli ve biraz daha hızlıydı.Böyle gayet güzel oldu. 
    //* modified by malisert32 
  
 const int LEDdizisi[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14}; 
  
 void setup () {      
   
   for(int i=0; i<14 ;i++)     
   {  
     pinMode(LEDdizisi[i], OUTPUT);  
   } 
  
 } 
  
 void loop() {                                                 
   for(int i=0; i<14; i++){ 
     digitalWrite(LEDdizisi[i],HIGH);       
     delay(60);                            
     digitalWrite(LEDdizisi[i],LOW);   
     delay(10);        
   } 
   
   for(int j=13;j>-1; j--) 
   {  
     digitalWrite(LEDdizisi[j],HIGH);      
     delay(60); 
     digitalWrite(LEDdizisi[j], LOW); 
     delay(10); 
   } 
 }