Test IDuino R3B On pin Output

void setup() {
  for (int i=0;i<20;i++){pinMode(i,1);}
}
void loop() {
  for (int i=0;i<20;i++){digitalWrite(i,1);}
  delay(200);
    for (int i=0;i<20;i++){digitalWrite(i,0);}
    delay(200);
}