int LEDPin = 9;   // declare LEDPin to arduino pin
int potPin = A0;  // declare potentiometer pin (potPin) analog pin A0
int readValue;    // variable to read potentiometer

float blinkRate;    // declare blinkRate variable
unsigned long previousMillis = 0; // store the last timestamp (assign 0 for now)


void setup() {

  Serial.begin(9600);       // turn on serial port
  pinMode(potPin, INPUT);   // set potPin to be an input
  pinMode(LEDPin, OUTPUT);  //  set LEDPin to an output

}

void loop() {
    unsigned long currentMillis = millis(); // get current timestamp

  readValue = analogRead(potPin);       // read potentiometer value and assign to readValue
  blinkRate = (-0.9 / 1023.0 * readValue + 1) * 1000; // calculate blinkRate and convert to milliseconds
  Serial.println(currentMillis - previousMillis);
  if (currentMillis - previousMillis >= blinkRate) {
    previousMillis = currentMillis;   // save last time LED was toggled

    digitalWrite(LEDPin, !digitalRead(LEDPin));   //toggle the LED without delay
  }

  // Serial.print("blinkRate: ");
  // Serial.println(blinkRate);

}