const int ledPins[] = {10, 11, 12, 13};
const int buttonPin = 7;

int pattern = 0;

void setup() {
    for(int i = 0; i < 4; i++) {
        pinMode(ledPins[i], OUTPUT);
    }
    pinMode(buttonPin, INPUT);
}

void loop() {
    int buttonState = digitalRead(buttonPin);
    
    if(buttonState == HIGH) {
        pattern++;
    }
    delay(50);

// Pattern 1
    if(pattern % 4 == 0) {
        for(int i = 0; i < 4; i++) {
            digitalWrite(ledPins[i], HIGH);
            delay(1000);
            digitalWrite(ledPins[i], LOW);
        }
    }

// Pattern 2
    if(pattern % 4 == 1) {
        for(int i = 0; i < 3; i++) {
            digitalWrite(ledPins[i], HIGH);
            digitalWrite(ledPins[i+1], HIGH);
            delay(1000);
            digitalWrite(ledPins[i], LOW);
            digitalWrite(ledPins[i+1], LOW);
        }
    }

// Pattern 3
    if(pattern % 4 == 2) {
        for(int i = 3; i >= 0; i--) {
            digitalWrite(ledPins[i], HIGH);
            delay(1000);
            digitalWrite(ledPins[i], LOW);
        }
    }

// Pattern 4
    if(pattern % 4 == 3) {
        for(int i = 3; i > 0; i--) {
            digitalWrite(ledPins[i], HIGH);
            digitalWrite(ledPins[i-1], HIGH);
            delay(1000);
            digitalWrite(ledPins[i], LOW);
            digitalWrite(ledPins[i-1], LOW);
        }
    }

}