import processing.serial.*;
Serial myPort;  // Create object from Serial class
String val;     // Data received from the serial port
int[] numbers = new int[4];
int teller = 0;
int getal = 84;
int vorig_getal = 84;
int uitkomst =84;
void setup()
{
  size(120,120); 
background(0);
  String portName = Serial.list()[0];
  myPort = new Serial(this, portName, 9600);
}

void draw()
{
  
  
  if ( myPort.available() > 0) 
                { 
                  getal = konvert (int(myPort.read())); 
                  println(getal);
                  
                 if (getal != vorig_getal)
                      {
                        background(0);
                        textSize(40);
                        text(getal, 35, 65);
                        }
                 vorig_getal = getal;       
                }
 
}

int konvert (int computergetal)
{
   if (computergetal  != 0)
                       {
                          if (computergetal != 32)
                             {
                               numbers[teller] = computergetal;
                               teller = teller + 1;
                          
                              }
                           
                      }
                   if ((computergetal == 32) ||  (computergetal == 0))
                      {
                         if (teller == 2)
                          {
                          uitkomst =  ((numbers[0]-48) * 10) +  (numbers[1]-48);         
                          }
                         if (teller == 1)
                          {
                          uitkomst =  numbers[0]-48;         
                           }
                  teller = 0;
                  numbers[0] = 0;
                  numbers[1] = 0;
                  numbers[2] = 0;
                  }
                  return uitkomst;
         
  
 }