drive - OpenProcessing

mySketch
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float xPos, yPos;
float angle = -90;
float speed;
bool up, down, left, right;
​
float angleVel;
​
float goalX, goalY;
float tail = 100;
​
void setup() {
  size(500, 500);
  xPos = width / 2;
  yPos = height / 2;
  
  goalX = random(width);
  goalY = random(height);
}
​
void draw() {
  //background(60);
  fill(50, tail);
  rect(0, 0, width, height);
​
  noStroke();
  
  fill(60, 240, 120);
  ellipse(goalX, goalY, 15, 15);
  
  fill(240, 60, 60);
  ellipse(xPos, yPos, 25, 25);
  triangle(xPos + 32.5 * cos(radians(angle)), yPos + 32.5 * sin(radians(angle)),
          xPos + 6.25 * cos(radians(angle + 90)) + 20 * cos(radians(angle)),
          yPos + 6.25 * sin(radians(angle + 90)) + 20 * sin(radians(angle)),
          xPos + 6.25 * cos(radians(angle - 90)) + 20 * cos(radians(angle)),
          yPos + 6.25 * sin(radians(angle - 90)) + 20 * sin(radians(angle)),);
  
  if (dist(goalX, goalY, xPos, yPos) <= 15) {
    tail *= 0.9;
    goalX = random(width);
    goalY = random(height);
  }
​
  speed *= 0.9;
  if (up)
    speed += .5;
  if (down)
    speed -= .5;
  
  if (speed > 5)
    speed = 5;
  if (speed < -5)
    speed = -5;
​
  if (right)
    angleVel += .75;
  if (left)
    angleVel -= .75;
  
  if (angleVel > 7.5)
    angleVel = 7.5;
  if (angleVel < -7.5)
    angleVel = -7.5;
  
  angle += angleVel;
  angleVel *= 0.85;
​
  xPos += speed * cos(radians(angle));
  yPos += speed * sin(radians(angle));
  
  xPos = (xPos + width) % width;
  yPos = (yPos + height) % height;
  
}
​
void keyPressed() {
  if (key == 'w' || keyCode == UP)
    up = true;
  if (key == 'a' || keyCode == LEFT)
    left = true;
  if (key == 's' || keyCode == DOWN)
    down = true;
  if (key == 'd' || keyCode == RIGHT)
    right = true;
}
​
void keyReleased() {
  if (key == 'w' || keyCode == UP)
    up = false;
  if (key == 'a' || keyCode == LEFT)
    left = false;
  if (key == 's' || keyCode == DOWN)
    down = false;
  if (key == 'd' || keyCode == RIGHT)
    right = false;
}