Im trying to send with Arduino the code below integers between 0-300 and creates a line graph in processing. It works fine when I use the serial terminal and I see 0-300, but when it is being received in processing it only sees up to 255 and then starts over 0-44. and then restarts.

//Arduino code

int a=0; 

void setup() {
  Serial.begin(9600);
}
 
void loop() {
  toSerial();
}

void toSerial() {
  Serial.write(a);
  if (a>300){
    a=0;
  }
  a++;
}

//processing code

import processing.serial.*;

Serial myPort;
int value;
int[] values = new int[400];

void setup(){
  size(400,400);
  String portName = Serial.list()[0];
  myPort = new Serial(this, portName, 9600);
  for(int i = 0; i<values.length;i++){
    values[i]=0;
  }
}

void draw(){
  getData();
  background(255);
  stroke(0);
  beginShape();
  for(int i = 0; i<values.length;i++){
    //println(values[i]);
    vertex(i,values[i]);
  }
  endShape();
}

void getData(){
  if ( myPort.available() > 0) {
    value = myPort.read();
    for(int i = 1; i<values.length;i++){
      values[i-1] = values[i];
    }
    values[values.length-1]=value;
  }
}
 
Thanks for the help Ken