chasing led's with a rotary encoder

ncdrvl = 0 //rotary encoder value
if (lncdrvl != ncdrvl){
   switch (ncdrvl % 6){
     case 0:
     digitalWrite(led1, LOW);
     digitalWrite(led2, LOW);
     digitalWrite(led3, LOW);
     digitalWrite(led4, LOW);
     digitalWrite(led5, LOW);
     break;
     case 1:
     digitalWrite(led1, HIGH);
     digitalWrite(led2, LOW);
     digitalWrite(led3, LOW);
     digitalWrite(led4, LOW);
     digitalWrite(led5, LOW);
     break;
     case 2:
     digitalWrite(led1, LOW);
     digitalWrite(led2, HIGH);
     digitalWrite(led3, LOW);
     digitalWrite(led4, LOW);
     digitalWrite(led5, LOW);
     break;
     case 3:
     digitalWrite(led1, LOW);
     digitalWrite(led2, LOW);
     digitalWrite(led3, HIGH);
     digitalWrite(led4, LOW);
     digitalWrite(led5, LOW);
     break;
     case 4:
     digitalWrite(led1, LOW);
     digitalWrite(led2, LOW);
     digitalWrite(led3, LOW);
     digitalWrite(led4, HIGH);
     digitalWrite(led5, LOW);
     break;
     case 5:
     digitalWrite(led1, LOW);
     digitalWrite(led2, LOW);
     digitalWrite(led3, LOW);
     digitalWrite(led4, LOW);
     digitalWrite(led5, HIGH);
     break;
   }
   Serial.print("encoder value:");
   Serial.println(ncdrvl);
   lncdrvl = ncdrvl;
 }