push LED

int led1 = 2;
int led2 = 3;
int led3 = 4;
int led4 = 5;

int sw = 8;

boolean sw000 = HIGH;
int ledStatus = 0;


void setup() {
  // put your setup code here, to run once:
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
 
  pinMode(sw, INPUT);
}
void loop() {
  // put your main code here, to run repeatedly:
  int swInput = debounceSwitch(sw, sw000);
  if((swInput == HIGH) && (sw000 == LOW)) {
    //กำหนดสถานะ led
    ledStatus = ledStatus +1;
    if (ledStatus > 4)ledStatus = 0;
   
}
sw000 = swInput;
if (ledStatus == 0){
  ledOutput(LOW,LOW,LOW,LOW);
}  else if (ledStatus == 1){
  ledOutput(LOW,LOW,LOW,HIGH);
}  else if (ledStatus == 2) {
  ledOutput(LOW,LOW,HIGH,HIGH);
} else if (ledStatus == 3) {
  ledOutput(LOW,HIGH,HIGH,HIGH);
} else {
  ledOutput(HIGH,HIGH,HIGH,HIGH);
}
}


void ledOutput (int ledVal1, int ledVal2, int ledVal3, int ledVal4) {
  digitalWrite (led1,ledVal1);
  digitalWrite (led2,ledVal2);
  digitalWrite (led3,ledVal3);
  digitalWrite (led4,ledVal4);
}

boolean debounceSwitch(int swPin, boolean LastLogic) {
  boolean currentLogic = digitalRead (swPin);
  if (currentLogic != LastLogic) {
    delay(2);
    currentLogic = digitalRead(swPin);
  }
  return currentLogic;
}