int trangthaitruoc = HIGH;
int count = 0;

void setup() {
  // put your setup code here, to run once:
 pinMode(2, INPUT);
 pinMode(3, OUTPUT);
 pinMode(4, INPUT);
 pinMode(5, OUTPUT);
 pinMode(6, INPUT);
 pinMode(7, OUTPUT);
}
void loop() {
  // put your main code here, to run repeatedly:
  // this speeds up the simulation
  int i = digitalRead(4);
  int x = digitalRead(2);
  int z = digitalRead(6);
 if(x==LOW && trangthaitruoc == HIGH){
  count++;
  delay(20);
}
trangthaitruoc =x;


if(count%2!=0){
  digitalWrite(3, HIGH);

}
else{
  digitalWrite(3, LOW);
}

  
  if(i==1){
    digitalWrite(5,HIGH);
    delay(20);
  }
  else{
digitalWrite(5, LOW);
delay(20);
  }

if(z==1){
  digitalWrite(7,HIGH);
}
else{
  digitalWrite(7, LOW);
}






}