visual.ino

// Variant A
switch (state) {
    case 1:
      digitalWrite(P1Out, LOW);  digitalWrite(P2Out, LOW);
      break;
    case 2:
      digitalWrite(P1Out, LOW);  digitalWrite(P2Out, HIGH);
      break;
    case 3: 
    case 4:
    case 5:
    case 6:
      digitalWrite(P1Out, HIGH); digitalWrite(P2Out, HIGH);
      break;
    case 7:
    case 8:
      digitalWrite(P1Out, HIGH); digitalWrite(P2Out, LOW);
      break;
    case 9:
      digitalWrite(P1Out, HIGH); digitalWrite(P2Out, HIGH);
      break;
    case 10:
      digitalWrite(P1Out, LOW);  digitalWrite(P2Out, HIGH);
      break;
    case 11:
    case 12:
    case 13:
      digitalWrite(P1Out, HIGH); digitalWrite(P2Out, HIGH);
      break;
    case 14:
      digitalWrite(P1Out, LOW);  digitalWrite(P2Out, HIGH);
      break;
    case 15:
    case 16:
      digitalWrite(P1Out, HIGH); digitalWrite(P2Out, HIGH);
      break;
    }



//Variant B (reordered)
switch (state) {
    case 1:
      digitalWrite(P1Out, LOW);  digitalWrite(P2Out, LOW);
      break;
    case 2:
    case 10:
    case 14:
      digitalWrite(P1Out, LOW);  digitalWrite(P2Out, HIGH);
      break;
    case 7:
    case 8:
      digitalWrite(P1Out, HIGH); digitalWrite(P2Out, LOW);
      break;
    case 3: 
    case 4:
    case 5:
    case 6:
    case 9:
    case 11:
    case 12:
    case 13:
    case 15:
    case 16:
      digitalWrite(P1Out, HIGH); digitalWrite(P2Out, HIGH);
      break;
    }