/*
LED Off Until Button Pressed

Blinks a light emitting diode(LED) connected to digital  
pin 7, when pressing a pushbutton attached to pin 3.


The circuit:
* LED attached from pin 7 to ground
* pushbutton attached to pin 3 from +5V
* 10K resistor attached to pin 3 to +5V
* 10K resistor pulls pin 3 and the button to HIGH by default

created 2005
by DojoDave
modified 30 Aug 2011
by Tom Igoe
modified for Hello Button + LED Board - 19 Mar 2012
by Anna Kaziunas France

*/

// constants won't change.
// They're used here to set pin numbers:
const int buttonPin = 6;     // the number of the pushbutton pin
const int ledPin =  7;      // the number of the LED pin

// initialize variables:
int buttonState = 0;         // variable for reading the pushbutton status

void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);    
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);     
}

void loop(){
// read the state of the pin the pushbutton is connected to:
buttonState = digitalRead(buttonPin);

// is the push button pressed?
// if not pressed - the button state is HIGH
// the pull up resistor the button / pin 3 makes the button state HIGH by default.
if (buttonState == HIGH) {     
// turn LED off (LED is off by default)
digitalWrite(ledPin, LOW);
}
//otherwise.....
// button is pressed
else {
// turn LED on:
digitalWrite(ledPin, HIGH);
}
}