import processing.serial.*;

Serial myPort;
char sendnumber;

void setup()
{
  size(200,200); //make our canvas 200 x 200 pixels big
  String portName = Serial.list()[1]; //change the 0 to a 1 or 2 etc. to match your port
  myPort = new Serial(this, portName, 9600);
}
void draw()
{
  myPort.write(sendnumber); //Sending data unto the arduino

  println(keyCode);
}
void keyPressed()
{

  switch(keyCode)
  {
    //Up
    case 38:
      sendnumber = '2';
      break;
      //Down
    case 40:
      sendnumber = '4';
      break;
      //Left
    case  37:
      sendnumber = '7';
      break;
      //Right
    case 39:
      sendnumber = '8';
      break;
  }
}
void keyReleased()
{
  switch(keyCode)
  {
  //Up
    case 38:
      sendnumber = 0;
      break;
      //Down
    case 40:
      sendnumber = 0;
      break;
      //Left
    case  37:
      sendnumber = 0;
      break;
      //Right
    case 39:
      sendnumber = 0;
      break;
  }


}