capacitive sensing

#include <CapacitiveSensor.h>
CapacitiveSensor cs_4_2 = CapacitiveSensor(4,2);

long total;
void setup()
{
  cs_4_2.set_CS_AutocaL_Millis(0xFFFFFFFF);
  Serial.begin(9600);
}
void loop()
{
  long start = millis();
  total = cs_4_2.capacitiveSensorRaw(500);
  Serial.print(millis() - start);
  Serial.println(total);
  delay(100);

}