void setup() {
  pinMode(22,OUTPUT);
  pinMode(19,OUTPUT);
  pinMode(18,OUTPUT);
  pinMode(5,OUTPUT);
  pinMode(15, INPUT);
  pinMode(2, INPUT);
  pinMode(0, INPUT);
  pinMode(4, INPUT);
}

void loop() {
  int PB1 = digitalRead(15);
    if ( PB1 == 0 )
    { 
digitalWrite(22, 1); 
}
else 
{
digitalWrite(22, 0); 
}
int PB2 = digitalRead(2);
    if ( PB2 == 0 )
    { 
digitalWrite(19, 1); 
}
else 
{
digitalWrite(19, 0); 
}

int PB3 = digitalRead(0);
    if ( PB3 == 0 )
    { 
digitalWrite(18, 1); 
}
else 
{
digitalWrite(18, 0); 
}

int PB4 = digitalRead(4);
    if ( PB4 == 0 )
    { 
digitalWrite(5, 1); 
}
else 
{
digitalWrite(5, 0); 
}
}