const int LED = 9;     // define the pin associated to LED
const int BUTTON = 7;  // define the pin associated to BUTTON
int state;             // define a variable called "state"

void setup() {
pinMode(LED, OUTPUT);    // set LED pin as output
pinMode(BUTTON, INPUT);  // set BUTTON pin as input
}

void loop() {
  state=digitalRead(BUTTON);
  if (state==1) {digitalWrite(LED, HIGH);}
  else {digitalWrite(LED, LOW);}
}