[Processing - Arduino] Send multiple data with Serial from Processing to Arduino

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I don't understand... I'm trying just a basic code and it doesn't work.

Arduino code :

int value;

void setup(){
  Serial.begin(9600);
}

void loop(){
  if(Serial.available() > 0){
    i++;
    value = Serial.read();
    Serial.println(value);
    delay(500);
  }else{
      Serial.println("Nothing is detected");
      delay(500);
  }
}

Processing code :

import processing.serial.*;

Serial myPort;

void setup(){
  size (100, 200);
  println(Serial.list());
  String portName = Serial.list()[2];
  myPort = new Serial(this, portName, 9600);
}

void draw(){
  for(int i = 0; i < 10; i++){
    myPort.write(i);
    println(i, " sent");
    delay(500);
  }
}

In my Arduino console, I obtained this :

1
23
5
678
9
0

Why did the "4" is missing ? And why do I have 2 and 3 stick together and 6, 7 and 8 ?

Thanks for help !