const int LED=18;
int Roberta=17;
bool ledState = LOW;
void setup() {

  pinMode(LED,OUTPUT);
  pinMode(Roberta,INPUT);
  // put your setup code here, to run once:

}

void loop() {
int buttonState = digitalRead(Roberta);

if (buttonState == LOW){
  ledState = !ledState;
  digitalWrite(LED,ledState);
  while(digitalRead(Roberta) == LOW);
  delay(200);
  
  
  }// put your main code here, to run repeatedly:

}