Hey! I just recently got into playing around with arduino and processing. And I came up with a little project and I have run into a few issues.

So the little project I have is this. I have the Arduino, and connected on a breadboard 3 variable resistors  connecting to A0, A1, A2. Pretty simple. What I want to do is send the data from each resistor to a processing program and simply control a shape. Size and X and Y position.

1. int val1 = 0;
   int val2 = 0;
   int val3 = 0;
   int sensorPin1 = A0;
   int sensorPin2 = A1;
   int sensorPin3 = A2;
   
   void setup(){
     Serial.begin(9600);
    
   }
   void loop(){
     
    val1 = analogRead(sensorPin1);
    val2 = analogRead(sensorPin2);
    val3 = analogRead(sensorPin3);
   
    Serial.write(val1);
    Serial.write(val2);
    Serial.write(val3);
   
   }

The code on the board.
My issue is that when I get it into processing it doesn't seem like very consistent data. In the serial monitor on the board it looks good. But not so much from processing. I also have a question about mapping the variable.

1. import processing.serial.*;
   
   Serial port;
   float valS;
   float valX;
   float valY;
   
   void setup(){
     size(800, 800);
   //  println(Serial.list());
     String arduinoPort = Serial.list()[0];
     port = new Serial(this, arduinoPort, 9600);
    
   }
   
   void draw(){
     if (port.available() > 0){
    
        valS = port.read();
        valS = map(valS, 0, 255, 0, height);
        valX = port.read();
        valX = map(valX, 0, 255, 0, height);
        valY = port.read();
        valY = map(valY, 0, 255, 0, height);
     }
     fill(#243a94);
     print("valS: ");
     println(valS);
     print("valX: ");
     println(valX);
     print("valY: ");
     println(valY);
     ellipse(valX , valX, valS, valY);
     delay(1000);
    
   }
   

That is the processing code I am currently working with. Import the serial Library, connect to the board and then this is where I am a little lost/think I am going something wrong. I call .read on my port (is this and object or a class?) and I assign it to the variables, but I never tell it that the sensor connected to A0 I want to be valS (size) etc. How do I go about doing that? Is there a way to see what is being sent to the program from the board and assign it to variables? 

If I could get a little help on this that would be great! If something doesn't make sense let me know.

Thanks