fan_littlebits_arduino.ino

void setup() {
  Serial.begin(9600);
  pinMode(0, INPUT);
}

bool on = false;
bool keep = false;

void loop() {
  int val = analogRead(A0);
  if (digitalRead(0) == HIGH) {
    keep = true;
  }
  else {
    if (keep) {
      on = !on;
    }
    keep = false;
  }
  if (on) {
    analogWrite(5, val / 4);
    analogWrite(9, val / 4);
  }
  else {
    analogWrite(5, 0);
    analogWrite(9, 0);
  }
}