bool t=false;
void setup() {
  pinMode(4, INPUT_PULLUP);
  pinMode(10, OUTPUT);
  pinMode(8, OUTPUT);
}


void loop() {
  int butst = digitalRead(4);
  if (butst == LOW) {
    if (t) {
      digitalWrite(10, HIGH);
      digitalWrite(8, LOW);
    }
    else {
      digitalWrite(8, HIGH);
      digitalWrite(10, LOW);
    }
  t = !t;
  delay(1);
  }
}