int Button = 12;
int LED = 10;

void setup() 
{
  // put your setup code here, to run once:
  pinMode(Button, INPUT);
  pinMode(LED, OUTPUT);
  digitalWrite(LED, LOW);
}

void loop() 
{

  while (digitalRead(Button)) {
    
    digitalWrite(LED, HIGH); 
    delay(150); 
    digitalWrite(LED, LOW);
    delay(150);
}
  digitalWrite(LED, HIGH); 
  delay(1050); 
  digitalWrite(LED, LOW);
  delay(1050);
}