ATtiny Capacitive Touch

I wrote a program that uses the capacitive touch sensor libraryainnsor/ for arduino to detect a finger touching the tip of a wire (or grasping the wire) and associates the sensor value with red, yellow and green leds. If there is a low value / no touch the red led turns on, if there is a light touch detected the yellow led turns on, and if there is a hard touch / finger grabbing the wire detected the green light is turned on.

#include <CapacitiveSensor.h>
CapacitiveSensor Sensor = CapacitiveSensor(3, 4);
long capVal;
#define green 2
#define yellow 1
#define red 0 

void setup()
{
Serial.begin(9600);
pinMode(green, OUTPUT);
pinMode(red, OUTPUT);
pinMode(yellow, OUTPUT);
}

void loop()
{
  capVal = Sensor.capacitiveSensor(30);
  //Serial.println(val);
  if (capVal < 50){
    digitalWrite(red,HIGH);
    digitalWrite(yellow,LOW);
    digitalWrite(green,LOW);
  }
  else if(capVal >= 50 && capVal <100){
    digitalWrite(red,LOW);
    digitalWrite(yellow,HIGH);
    digitalWrite(green,LOW);
  }
  else if (capVal >= 100)
  {
    digitalWrite(red,LOW);
    digitalWrite(yellow,LOW);
    digitalWrite(green,HIGH);
  }
  delay(500);
}