const int led1 = 13;
const int led2 = 10;
const int button1 = 2;
const int button2 = 3;

void setup() {
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(button1, INPUT);
  pinMode(button2, INPUT);
}

void loop() 
{
  do 
	{
    	digitalWrite(led1, HIGH);
  	} 	

	while (digitalRead(button1) == HIGH);
  digitalWrite(led1, LOW);

  do 
	{
	  digitalWrite(led2, HIGH);
  	} 
while (digitalRead(button2) == HIGH);
  digitalWrite(led2, LOW);
}