byte seg_table[] = {
  //pgfedcba
  0b00111111, //0
  0b00000110, //1
  0b01011011, //2
  0b01001111, //3
  0b01100110, //4
  0b01101101, //5
  0b01111101, //6
  0b00000111, //7
  0b01111111, //8
  0b01101111, //9
};

void setup() {
DDRD = 0xFF;
}

void loop() {
 int poti = analogRead(A0)/110;
 PORTD = seg_table[poti];
}