int Led=2;
int pushbutton=7;

void setup() {
  // put your setup code here, to run once:
pinMode(Led, OUTPUT);
pinMode(pushbutton, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
int pushbuttonstate=digitalRead(pushbutton);

if (pushbuttonstate == LOW) {
  digitalWrite(Led, HIGH);
  delay(5000);
}else{
  digitalWrite(Led, LOW);
}

}