Hi, i am trying to comunicate arduino sending data, captured by a LDR, to be recieved from processing and translated to an animation, an interaction. I can comunicate the two aplications, i can read the values from arduino printed in the printboard of processing, but i dont know why doesn't process the function well.

i paste the both codes below: arduino and processing, if somebody can help me to resolve this problem. thanks a lot

processing:

////////////////////////////////////////////////////////////////
import processing.serial.*;
Serial port;

////////////////////////////////////////////////////////////////
int val;
int myString;

////////////////////////////////////////////////////////////////
BlinkingEye eye1;
float y;
float x;

////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////
void setup()
{
 size(200,200);

 port = new Serial(this,"/dev/cu.usbserial-A9005f9C",9600);
// println ("port: /dev/cu.usbserial-A9005f9C");
// println(Serial.list());
   
 frameRate(25);
 smooth();
 background(255);
 //noCursor();

 eye1 = new BlinkingEye(width, height);
 //eye2 = new BlinkingEye(width, height);  
}

////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////
void draw()
{

 background(255);
 noStroke();


 byte[] buffer = new byte[val];

 while (port.available() > 0) {
   buffer = port.readBytes();
   port.readBytes(buffer);

   if (buffer != null) {
     String myString = new String(buffer);
     println(myString);
   }
 }
//please someone can explain me this part?(the while and if)

 if(myString < 900){
   x = 100;
   y = 60;
 }
 else{
   x = 60;
   y = 60;
 }

 eye1.update(x, y);

 eye1.draw();

}
*the code for the class is declared in a new tab.



arduino:

//mostrar valores processing


int pinLed= 10;
int pinLDR = 2;

int myString;
int val=0;



void setup() {
 pinMode(pinLed, OUTPUT);
}


void loop() {
 Serial.begin(9600);
 val = analogRead(pinLDR);
 myString = analogRead(pinLDR);
 
 Serial.println(val);

 
 if(Serial.available())
 {
   val = Serial.read();
   
 }
 if(val < 900) //valor variable en consonancia a la luz y la sensibilidad del LDR
 digitalWrite(pinLed,LOW);
 
 else
 digitalWrite(pinLed,HIGH);
 
 
 delay(1000);
}