This has been killing me, so I would really appreciate help on this. I'm trying to send the X and Y axis plot from Processing to an Arduino, each having 3 digits. Bellow you can see the code for the Arduino, I'm simply trying to run a test to see if the Processing is sending X: 123, hence the IF statement.

1. int incoming;
   
   int A;
   int B;
   int C;
   int D;
   int E;
   int F;
   
   int X;
   int Y;
   
   int ledPin = 13;
   
   void setup()
   {
     Serial.begin(9600);
     pinMode(ledPin, OUTPUT);
     Serial.println("start");
   }
   
   void loop()
   {
   //  uint8_t c;
     if(Serial.available() > 0)
     {
       delay(2000);
       incoming = (Serial.read()-48);
       A = incoming;
         if(Serial.available()>0)
           {
             incoming = (Serial.read()-48);
             B = incoming;
           }
             if(Serial.available()>0)
             {
             incoming = (Serial.read()-48);
             C = incoming;
             }
               if(Serial.available()>0)
               {
                 incoming = (Serial.read()-48);
                 D = incoming;
               }
                 if(Serial.available()>0)
                 {
                   incoming = (Serial.read()-48);
                   E = incoming;
                 }
                   if(Serial.available() > 0);
                   {
                     incoming = (Serial.read()-48);
                     F = incoming;
                   }
      
       X = ((A*100)+(B*10)+C);
       Y = ((D*100)+(E*10)+F);
      
       Serial.print("X: ");
       Serial.print(X);
       Serial.print("  Y: ");
       Serial.println(Y);
      
       if(X == 123)
       {
         digitalWrite(ledPin, HIGH);
       }
       if(X != 123)
       {
         digitalWrite(ledPin, LOW);
       }
   }
   }

Then I created a very basic program in Processing in attempt to send (123456) to test the X IF statement. I have also done this where it has myPort.Write(1); followed by 2-3-4-5-6 as well, that is why there is a delay in the Arduino, in hopes to receive all information.

1. import processing.serial.*;
   Serial myPort;
   
   int A = 123456;
   
   void setup()
   {
     myPort = new Serial(this, Serial.list()[1], 9600);
   }
   
   void draw()
   {
     if(mousePressed)
     {
       myPort.write(123456);
       //myPort.write(A);
       //myPort.write(int(A));
       //myPort.write(binary(A));
     }
    
     if(myPort.available() > 0)
     {
       delay(50);
      // print(myPort.read()-48);
       print("    ");
       println(myPort.read()-48);
     }
   }

So please, kindly point me in the direction I need to go so I can end this problem. If you are wondering about the print code in the Processing, I was using that to figure out what type of signal I was receiving from the Arduino. I have a suspicion that my entire problem is that one is sending in ASCII while the other is doing Binary, Bytes or something else.

Thank you for anything!