int led = 3;
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 statusButton = digitalRead(pushButton);
  if(statusButton == HIGH){
    digitalWrite(led, HIGH);
  }
  else{
    digitalWrite(led, LOW);
  }
}