# Stuck with SIZE command
**URL:** https://discourse.processing.org/t/stuck-with-size-command/4441
**Category:** Electronics (Arduino, etc.)
**Created:** [October 13, 2018, 9:15pm UTC](https://discourse.processing.org/t/stuck-with-size-command/4441 "2018-10-13T21:15:33Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@sljivan](https://discourse.processing.org/u/sljivan)
#### Post date: [October 13, 2018, 9:15pm UTC](https://discourse.processing.org/t/stuck-with-size-command/4441/1 "2018-10-13T21:15:33Z")
Hello guys.
I am trying to control my servo with Processing. And it actually works.
But I wanted to fool around with the code a bit to get a grip off it, and I started changing a [tutorial code](https://www.arduino.cc/en/Tutorial/Dimmer) a bit.
And I ran into a wall which I can not figure out.
Originally window size is (256x150) and I have tryed to change it. When I expanded or shrunk the Y axis, it was all good.
But when I expanded the X axis the problems occurred whether I was shrunk it or expanded it. It gave me a border inside the window, and when I crossed it with mouse, the servo jumped back to 0 position, telling me that it mouseX read a 0 again, though I havenโt reached the end of my window.
This is my code:
> [@](#):
>
> import processing.serial.\*;
> Serial port;
>
> void setup() {
> size( **300** , 300);
>
> ```
> println("Available serial ports:");
> // if using Processing 2.1 or later, use Serial.printArray()
> println(Serial.list());
>
> port = new Serial(this, Serial.list()[1], 9600);
>
> ```
>
> }
>
> void draw() {
> // draw a gradient from black to white
> for (int i = 0; i \< 300; i++) {
> // color
> stroke(i);
> // x1 y1 x2 y2
> line(i, 0, i, **300** );
> }
I have altered my Arduino code, and it works OK. It seems that I ran into some sort of boundary in Processing.
Anyone knows what I did wrong?
Picture depicts, how my window looks like.
---
### Author:  [@TfGuy44](https://discourse.processing.org/u/TfGuy44)
#### Post date: [October 13, 2018, 10:21pm UTC](https://discourse.processing.org/t/stuck-with-size-command/4441/2 "2018-10-13T22:21:12Z")
The problem has got to be something related to the fact that you are using a single byte to communicate. With one byte, the values that byte can represent range from 0 (0x00000000) to 255 (0x111111111). If you try to store more than 255 in a byte, it wraps around, back to 0, because it can only copy the lowest 8 bits!
---
### Author:  [@sljivan](https://discourse.processing.org/u/sljivan)
#### Post date: [October 13, 2018, 10:33pm UTC](https://discourse.processing.org/t/stuck-with-size-command/4441/3 "2018-10-13T22:33:38Z")
@TfGuy44 thank you for your reply. I was so excited about your anser that I tried it immediately.
I have done the following:
> [@](#):
>
> import processing.serial.\*;
> Serial port;
> **_int mousepos;_**
and also:
> [@](#):
>
> mousepos=mouseX;
> port.write(mousepos);
so I have made it an integer. Still, I face the same problem. ๐
---
### Author:  [@TfGuy44](https://discourse.processing.org/u/TfGuy44)
#### Post date: [October 13, 2018, 10:38pm UTC](https://discourse.processing.org/t/stuck-with-size-command/4441/4 "2018-10-13T22:38:16Z")
๐
You should be able to write ints.
[https://processing.org/reference/libraries/serial/Serial\_write\_.html](https://processing.org/reference/libraries/serial/Serial_write_.html)
Can we see your full code?
---
### Author:  [@sljivan](https://discourse.processing.org/u/sljivan)
#### Post date: [October 13, 2018, 10:44pm UTC](https://discourse.processing.org/t/stuck-with-size-command/4441/5 "2018-10-13T22:44:58Z")
there it is:
> [@](#):
>
> import processing.serial.\*;
> Serial port;
> int mousepos;
>
> void setup() {
> size(300, 150);
>
> ```
> println("Available serial ports:");
> // if using Processing 2.1 or later, use Serial.printArray()
> println(Serial.list());
>
> // Uses the first port in this list (number 0). Change this to select the port
> // corresponding to your Arduino board. The last parameter (e.g. 9600) is the
> // speed of the communication. It has to correspond to the value passed to
> // Serial.begin() in your Arduino sketch.
> port = new Serial(this, Serial.list()[1], 9600);
>
> // If you know the name of the port used by the Arduino board, you can specify
> // it directly like this.
> //port = new Serial(this, "COM1", 9600);
>
> ```
>
> }
>
> void draw() {
> // draw a gradient from black to white
> for (int i = 0; i \< 300; i++) {
> // color
> stroke(i);
> // x1 y1 x2 y2
> line(i, 0, i, 150);
> }
>
> ```
> // write the current X-position of the mouse to the serial port as
> // a single byte
> mousepos=mouseX;
> port.write(mousepos);
>
> ```
>
> }
on the arduino side I have also turned all variables into integers.
@TfGuy44 - Thanks man!