const int touchPin = 4; 
const int ledPin = 16;
const int threshold = 20;
int touchValue;
void setup()
{
Serial.begin(115200);
delay(1000); 
pinMode (ledPin, OUTPUT);
}
void loop() 
{
touchValue = touchRead(touchPin); 
Serial.print(touchValue); 
if(touchValue < threshold)
{
digitalWrite(ledPin, HIGH); 
Serial.println(" - LED on");
}
else 
{ 
digitalWrite(ledPin, LOW);
Serial.println(" - LED off");
}
delay(1000);
}