Lighting up a series of LEDs - Tsveta

int pinNumber = 0;

int buttonPin = 2;

int buttonState = 0;

int delaytime = 700;

void setup(){

Serial.begin(9600);

pinMode(buttonPin, INPUT);

if (pinNumber > 9){

pinMode(pinNumber, OUTPUT);

}

}

void loop{

buttonState = digitalRead(buttonPin);

if(buttonState == HIGH) {

for ( int pinNumber = 0; i <= 13; pinNumber++){

digitalWrite(pinNumber, HIGH);

delay(delaytime - 200);

digitalWrite(pinNumber, LOW);

delay(delaytime);

}

delay(delaytime + 200);

for ( int pinNumber = 13; i => 9; pinNumber--){

digitalWrite(pinNumber, HIGH);

delay(delaytime);

digitalWrite(pinNumber, LOW);

delay(delaytime - 200);

}

}

if(buttonPin == LOW){

digitalWrite(pinNumber, LOW);

delay(delaytime);

}

}