Button Pressed (on and off)

sketch_jan15g.ino

// BLINKING LED on/off
//Camille Kauffman
//excercise 4-5 from Getting Started with Arduino

const int LED = 12; //the pin for the LED
const int BUTTON = 7;//the input pin whrtr the pushbutton is connected

int val = 0;//val will be used to store the state of the input pin

int old_val = 0;//this variable stores the previous value of "val"

int state = 0;// 0 = LED off and 1 = LED on


void setup() {
  pinMode(LED, OUTPUT); // tell Arduino LED is an output
  pinMode(BUTTON, INPUT); // and button is an input
  }
  
  
  void loop(){
val = digitalRead(BUTTON); // read input value and store it yum, fresh?! lol

// check if there was a transition
if ((val == HIGH) && (old_val == LOW)){
  state = 1 - state;
  delay(20);
}
  
  
old_val = val;//val is now old, let's store it

if (state == 1) {
digitalWrite(LED, HIGH); // turn LED ON
}else{ 
  digitalWrite(LED, LOW);
 } 
}