Page Comparison

int rotation;
int lastMousePos;
int mouseMovement;
 boolean forward = true;
 
void setup()
{
  size(900, 400);      // def. window size
}

void draw()
{
  mouseMovement = mouseX-lastMousePos;
 // println(mouseX-lastMousePos);
  background(255);
  //wheel(width/2, height/2);
  car(mouseX, height/2);
  lastMousePos = mouseX;
}

void car(int x, int y) {
   rotation+= abs(mouseMovement);
  pushMatrix();
  translate(x, y);
  if (mouseMovement<0) {
    forward = false;

  } 

  if (mouseMovement>0) {
    forward = true;
  }

  
  if(forward == false) {
    scale(-1,1);
  }
  
  
  println(forward);
  fill(100, 0, 0);
  noStroke();
  beginShape();
  vertex(0, 0);
  vertex(5, -50);
  vertex(50, -50);
  vertex(70, -80);
  vertex(150, -80);
  vertex(190, -50);
  vertex(265, -45);
  vertex(270, 0);
  vertex(0, 0);
  endShape();
  wheel(60, 0);
  wheel(210, 0);
  popMatrix();
}

void wheel(int x, int y) {
  pushMatrix();
  translate(x, y);
  rotate(radians(rotation));
  int radius = 25;
  fill(0, 100, 0);
  stroke(0);
  strokeWeight(7);
  ellipse(0, 0, radius*2, radius*2);
  strokeWeight(4);
  line(0-radius, 0, 0+radius, 0);
  line (0, 0-radius, 0, 0+radius);
  noStroke();
  popMatrix();
}