Linear actuator sweep in arduino

int ledPin = 10;    // LED connected to digital pin 9
int maxValue = 255;
int minValue = 0;
int increment = 5;
void setup()  { 
  // nothing happens in setup 
} 

void loop()  { 
  // fade in from min to max in increments of 5 points:
  for(int fadeValue = minValue ; fadeValue <= maxValue; fadeValue +=increment) { 
    // sets the value (range from 0 to 255):
    analogWrite(ledPin, fadeValue);         
    // wait for 30 milliseconds to see the dimming effect    
    delay(300);                            
  } 

  // fade out from max to min in increments of 5 points:
  for(int fadeValue = maxValue ; fadeValue >= minValue; fadeValue -=increment) { 
    // sets the value (range from 0 to 255):
    analogWrite(ledPin, fadeValue);         
    // wait for 30 milliseconds to see the dimming effect    
    delay(300);                            
  } 
}