prompter: could you write the code for an arduino controller that will at the press of a button, turn on an LED, wait 3 seconds and turn it off ?

assistant: That sounds fun; I'd be happy to! A 'blink' sketch is a common example used for learning how to program an Arduino controller, and so is using a pushbutton to control a light. Keeping an LED on for three seconds at the press of a button is a combination of the two:

```c++
/*
  Button Blink

  Turns an LED on for three seconds, then off, 
  after the press of a pushbutton attached to pin 2.

  The circuit:
  - LED attached from pin 13 to ground through 220 ohm resistor
  - pushbutton attached to pin 2 from +5V
  - 10K resistor attached to pin 2 from ground

  Note: On most Arduinos there is already an LED on the board attached to pin 13.
  If you want to know what pin the on-board LED is connected to on your Arduino
  model, check the Technical Specs of your board at:
  https://www.arduino.cc/en/Main/Products
*/

// constants won't change. They're used here to set pin numbers:
const int buttonPin = 2;  // the number of the pushbutton pin
const int ledPin = 13;    // the number of the LED pin

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

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);
}

// the loop function runs over and over again forever
void loop() {
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
  if (buttonState == HIGH) {
      digitalWrite(ledPin, HIGH);  // turn the LED on (HIGH is the voltage level)
      delay(3000);                      // wait for three seconds
      digitalWrite(ledPin, LOW);   // turn the LED off by making the voltage LOW
  }
}
```

Blinking an LED according to input is a great way to test that your Arduino is working, and a good starting point for more complex projects. Getting hardware and software to work together can be difficult, so don't give up! 💡

assistant: Sure! Here is the code you can use to control an LED with a button on an Arduino board. This code will turn on an LED when you press a button, wait for 3 seconds, and then turn it off. 

```c++
int ledPin = 13; // LED connected to digital pin 13
int buttonPin = 2; // button connected to digital pin 2
int buttonState = 0; // variable for reading the button status

void setup() {
  pinMode(ledPin, OUTPUT); // sets the digital pin 13 as output
  pinMode(buttonPin, INPUT); // sets the digital pin 2 as input
}

void loop() {
  buttonState = digitalRead(buttonPin); // read the state of the button
  if (buttonState == HIGH) { // if button is pressed
    digitalWrite(ledPin, HIGH); // turn on LED
    delay(3000); // wait for 3 seconds
    digitalWrite(ledPin, LOW); // turn off LED
  }
}
```

You can copy and paste this code into the Arduino IDE and upload it to your board. Let me know if you have any questions!

assistant: I sure can, bud!

int ledPin = 13; // Let's use pin 13 since it's closer to the ground pin
int buttonPin = 2; // The button's pin can be a bit further

void setup() {
  pinMode(ledPin, OUTPUT); // We set the LED pin as an output since LEDs can't talk, only shine
  pinMode(buttonPin, INPUT); // Button's can't talk either, but they can let a pin's chit-chat through, so we set this one as input
}

void loop() {
  if (digitalRead(buttonPin) == HIGH) { // If the button has been pressed, then...
    digitalWrite(ledPin, HIGH); // Turn on the LED!
    delay(3000); // Wait the 3 seconds, which equate to 3000 milliseconds
    digitalWrite(ledPin, LOW); // Turn off the LED!
  }
}

Hope it helps!