#include <SevSeg.h>  
SevSeg sevseg;       
const int potPin = 27;
void setup() 
{
  byte numDigits = 4;
  byte digitPins[] = {0, 3, 4, 11}; 
  byte segmentPins[] = {1, 5, 9, 7, 6, 2, 10};
  sevseg.begin(COMMON_CATHODE, numDigits, digitPins, segmentPins);
  pinMode(potPin, INPUT);
}
void loop() 
{
   int sensorValue = analogRead(potPin);
   int displayValue = map(sensorValue, 0, 1023, 0, 1024);
   sevseg.setNumber(displayValue, 0);
   sevseg.refreshDisplay();   
   delay(1);  
}