brightness is zero every time through loop. loop is essentially this...
void loop(){
int val = analogRead(sensorPin);
Serial.println(val);
//just to slow down the output - remove if trying to catch an object passing by
delay(1000);
if (val >= 1000){
counter++;
counter = counter%5;
}
Serial.println(counter);
if (counter == 1){
// set the brightness of pin 9:
analogWrite(2, 0);
// wait for 30 milliseconds to see the dimming effect
delay(30);
}
//some else ifs here for the counters 2 - 4, cut for length
else {
//all off
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
digitalWrite(5, LOW);
digitalWrite(6, LOW);
}
}
...which is clearly not what you want. Does this bring any clarity... http://arduino.cc/en/Reference/scope