This code summarizes an Arduino sketch that blinks an LED by turning it on for one second and off for one second repeatedly. It defines an integer variable 'led' set to pin 13, which is connected to an LED on most Arduino boards. In setup, it defines pin 13 as an output. The main loop turns the LED on by setting pin 13 high for one second, then off by setting it low for one second, repeating indefinitely.

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/*
Blink
Turns on an LED on for one second, then off for one second, repeatedly.
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This example code is in the public domain.
*/
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// Pin 13 has an LED connected on most Arduino boards.
// give it a name:
int led = 13;
// the setup routine runs once when you press reset:
void setup() {
// initialize the digital pin as an output.
pinMode(led, OUTPUT);
}
// the loop routine runs over and over again forever:
void loop() {
digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000);
// wait for a second
digitalWrite(led, LOW); // turn the LED off by making the voltage LOW
delay(1000);
// wait for a second
}

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CODE
int sensorPin = A0;
int sensorValue = 0;
void setup()
{
Serial.begin(9600);
pinMode(sensorPin, INPUT);
}
void loop()
{
sensorValue = analogRead(sensorPin);
Serial.println(sensorValue);
delay(1500);
}

9. import processing.serial.*;
import cc.arduino.*;
Arduino arduino; //creates arduino
object
color back = color(64, 218, 255);
//variables for the 2 colors
int sensor= 0;
int read;
float value;
void setup() {
size(800, 600);
arduino = new Arduino(this,
Arduino.list()[0], 57600); //sets up
arduino
arduino.pinMode(sensor,
Arduino.INPUT);//setup
pins to be input (A0
=0?)
background(back);
}
void draw() {
read=arduino.analogR
ead(sensor);
background(back);
println (read);
value=map(read, 0, 5
00, -200, width*4);
//use to callibrate
ellipse(value, 300,30,
30);
}

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Processing.org
Arduino.cc
PDF Books
Google images
Wikipedia

20. Thanks for listening
and
I hope you liked