//Define Analog Pin 
#define PinA0 14  // D14/A0     PC0                       ADC[0]    
#define PinA1 15  // D15/A1     PC1                       ADC[1] 
#define PinA2 16  // D16/A2     PC2                       ADC[2]  
#define PinA3 17  // D17/A3     PC3                       ADC[3]
#define PinA4 18  // D18/A4     PC4     I2C	SDA (Data)    ADC[4]
#define PinA5 19  // D19/A5     PC5     I2C	SCL (Clock)   ADC[5]
#define PinA6 20  //     A6     ADC[6]                    ADC[6]
#define PinA7 21  //     A7     ADC[7]                    ADC[7]
//      PinA10 10 // +5V       +5V Power Rail Output
#define PinA11 11 // RESET     PC6 
//      PinA12 12 // GND
//      PinA13 13 // VIN       Voltage Input 5-12V
//      USB        // USB       Voltage Input 5V

//Define Digital Pin 
// Pin 3,5,6,9,10,11 have hardware ~ PWM support.
#define PinD00 0  // D0/RX     PD0             Serial (USART)	RX
#define PinD01 1  // D1/TX     PD1             Serial (USART)	TX
#define PinD02 2  // D2        PD2             External interrupt	INT0
#define PinD03 3  // D3~       PD3             External interrupt	INT1
#define PinD04 4  // D4        PD4
#define PinD05 5  // D5~       PD5
#define PinD06 6  // D6~       PD6
#define PinD07 7  // D7        PD7
#define PinD08 8  // D8        PB0                                     P1 Atmega328 Serial Wire Debug
#define PinD09 9  // D9~       PB1                                     P2 Atmega328 Serial Wire Debug
#define PinD10 10 // D10~      PB2             SPI	SS (Chip select)    P3 Atmega328 Serial Wire Debug
#define PinD11 11 // D11~      PB3     CIP0    SPI	MOSI                P4 Atmega328 Serial Wire Debug
#define PinD12 12 // D12       PB4     COPI    SPI	MISO                P5 Atmega328 Serial Wire Debug
#define PinD13 13 // D13       PB5     LED     SPI	SCLK (Clock)        P6 Atmega328 Serial Wire Debug

//  8 bit timer    Timer0, Timer 2
// 16 bit timer    Timer1,
// GPIO            Including External/Pin Change Interrupts  
// Watchdog Timer	 Usage example

//Define Digital Pin 
// +3V3       5V USB Power Output

void setup() {
  // put your setup code here, to run once:
  pinMode(PinA6, OUTPUT);
  pinMode(PinA5, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(PinA6, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(PinA6, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second

   // put your main code here, to run repeatedly:
  digitalWrite(PinA5, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(PinA5, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
}