Changing direction of fan with Edge breach

const int pinDir1 = 9;
const int pinDir2= 3;
const int pinmotor = 2; //on and off
const int onoffbutton = 12; //this button is used to turn the motor on and off
const int changedirectionbutton = 11; //this button is used to change the direction of the motor; so in turn changing direction fan is blowing.
const int potpin = A0;
boolean currentonoffval = false;
boolean lastonoffval = false;
boolean currentchangeval = false;
boolean lastchangeval = false;//change direction
boolean motoron = false;
boolean Direction;
int speeding = false;


void setup()
{
  pinMode (onoffbutton, INPUT);
  pinMode (changedirectionbutton, INPUT);
  pinMode (potpin, INPUT);
  pinMode (pinmotor, OUTPUT);
  Serial.begin (9600);
  digitalWrite (pinmotor, LOW);//make sure the motor is off in the beginning
}
boolean debounce (boolean last, int button)
{
  boolean current = digitalRead (button);
  if (last != current)//if lastbutton is different than currentbutton then delay for 5 milliseconds and read the currentbutton
  {
    delay (5);
    current = digitalRead (button);
  }
  return current;
}

void loop()
{
  currentonoffval = debounce (lastonoffval, onoffbutton);
  Serial.println (currentonoffval);
  if (lastonoffval == LOW && currentonoffval == HIGH)
  {
    motoron =! motoron;//press button turn motor on
  }
  currentchangeval = debounce (lastchangeval, changedirectionbutton);
  if (lastchangeval == LOW && currentchangeval == HIGH)//pressed button so change direction
  {
    Direction =! Direction;
  }
  if (Direction)//makes it true and false and determines the flow. changes what openings are open
  {
    digitalWrite (pinDir1, HIGH);//true: forward
    digitalWrite (pinDir2, LOW);
  }
  else
  {
    digitalWrite (pinDir1, LOW);//false: backwards
    digitalWrite (pinDir2, HIGH);
  }
  speeding = analogRead (potpin);
  Serial.println (speeding);
  speeding = map (speeding, 0, 1023, 0,255);
  speeding = constrain (speeding, 0, 255);
  if (motoron)
  {
    analogWrite (pinmotor, speeding);//on: make it go at this speed
  }
  else
  {
    analogWrite (pinmotor, 0);//off: then stop(can't use low because the analog would have to be digital)
  }
  lastchangeval = currentchangeval;
  lastonoffval = currentonoffval;
}