4 leds and a button

Projects Programming
8

Hi guys. First of all, thanks for the all replies and tips. I managed to learn some basics of millis, but I don't know how to do this. I had an idea, but it's not working . LEDs are on when I press, but they're not turning on and off. When I release the button, they're off. That part is working. Here's the code:

#include <Bounce2.h>
int pin[4] = {7, 6, 5, 4};
int btn = 8;
int dt = 250;
int pt = 0;
int state = LOW;
Bounce b = Bounce();
void setup() {
  b.attach(btn, INPUT);
  b.interval(250);
  pinMode(pin[0], OUTPUT);
  pinMode(pin[1], OUTPUT);
  pinMode(pin[2], OUTPUT);
  pinMode(pin[3], OUTPUT);
}
void loop() {
  int g = digitalRead(btn);
  int ct = millis();
  if(g==0){
      digitalWrite(pin[0],HIGH);
      if(ct-pt>=dt){
      pt=ct;
      digitalWrite(pin[0],LOW);
      }
      digitalWrite(pin[1],HIGH);
      if(ct-pt>=dt){
      pt=ct;
      digitalWrite(pin[1],LOW);
      }    
      digitalWrite(pin[2],HIGH);
      if(ct-pt>=dt){
      pt=ct;
      digitalWrite(pin[2],LOW);
      }
      digitalWrite(pin[3],HIGH);
      if(ct-pt>=dt){
      pt=ct;
      digitalWrite(pin[3],LOW);
      }
      }
      if(g==1){
        digitalWrite(pin[0],LOW);
        digitalWrite(pin[1],LOW);
        digitalWrite(pin[2],LOW);
        digitalWrite(pin[3],LOW);
        }
  }