const int LED=22;
const int BUTTON=21;
void setup() {
  // put your setup code here, to run once:
  pinMode(LED, OUTPUT);
  pinMode(BUTTON, INPUT);
  Serial.begin(115200);
  
}

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

if(digitalRead(BUTTON)==0)
{
  digitalWrite(LED, LOW);
}
}