inplermenting strobe function

Projects Programming
1

hello in making a led flashlight with arduino pro mini inside to contole the led on a mosfet.
i now have pwm working with 5 steps and resetting but i would love to have a strobe function
but i have no idea how to do this

this is my code

int switchPin = 8;
int ledPin = 11;
boolean lastButton = LOW;
boolean currentButton = LOW;
int ledLevel = 0;

int Voltin1 = A0;
float Volt1;

void setup() 

{      
  pinMode(switchPin, INPUT);
  pinMode(ledPin, OUTPUT);
}

boolean debounce(boolean last)
{
  boolean current = digitalRead(switchPin);
  if (last != current)
  {
    delay(5);
    current = digitalRead(switchPin);
  }
  return current;
}
void loop() 
{
  currentButton = debounce(lastButton);
  if (lastButton == LOW && currentButton == HIGH)
  {
    ledLevel = ledLevel + 51;
  }
  lastButton = currentButton;

  if (Volt1 = 9)ledLevel = 0;
  if (ledLevel > 255) ledLevel = 0;
  analogWrite(ledPin, ledLevel);


  Volt1 = analogRead(Voltin1);
  Volt1 = Volt1 / 24;
}

i just want to press the button after the led is on full power (255) instead of it going back to 0 its going to strobe and wen i press it one more time it turns off
if someone can help me with that i will be greateful

2 
  if (Volt1 = 9)ledLevel = 0;

After you assign the value 9 to Volt1, the test will be true. You probably want == in there, not =.

  if (ledLevel > 255) ledLevel = 0;

Well, that's why the LED is strobing. If you cap ledLevel at 255, rather then setting it back to 0, the strobing will stop.