I'm trying to use processing to create a simple graphical front end to operate a stepper motor that I have hooked up to an Arduino.  Currently, I have a program on the arduino such that it is listening for serial communication to move the stepper motor.  I have two "buttons" that I've created with processing.  The goal being that when I click on the upper button, it writes a value to the serial buffer, and when I click the lower button, it sends a different value.  Here is my current code:

 

 

import processing.serial.*;

 

void setup(){

Serial myPort;
myPort= new Serial(this, Serial.list()[1], 9600);

 

  size(320,400);
}

 

void draw(){
  background(0);
  fill(128);
  rect(100,100,50,50);
  rect(100,200,50,50);
}

 

void mouseClicked(){

  if(mouseX > 100 &&  mouseX < 150 && mouseY > 100 && mouseY < 150){
    println("up");
    myPort.write(56);
  }
  if(mouseX > 100 &&  mouseX < 150 && mouseY > 200 && mouseY < 250){
    println("down");
    myPort.write(50);
  }
}

 

I get the message "Cannot find anything named "myPort". 

 

I'm very new to processing, and any information would be very helpful.

 

Thanks!