float birdX=100, birdY=30;    // Bird position
float birdDX=2, birdDY=1;  // Bird speed
float horizon=200;
float sunX=325;

int rate=50;



void setup() {
   size(500,500);
   frameRate(rate);
}

void mousePressed() {
  //// 
  birdX=  50;
  birdY=  random(0,horizon);
}

void keyPressed() {
  //// Handle keys ////
  if (key == '+') {
      birdDX=  birdDX * 1.5;
      birdDY=  birdDY * 1.5;
  } else if (key == '-') {
      birdDX=  birdDX * 0.8 ;
      birdDY=  birdDY * 0.8 ;
  } else if (key == 'q') {
    exit();
  }
}
void draw()        //// Draw the frame
{
  scene();  
  bird();      // Do the bird stuff
  
  //body//
  smooth();
  rectMode(CENTER);
  fill(255,150,0);
  rect( 400,215, 25, 80 );
  line( 388, 250, 350, 300);
}

void bird() {
  //// Move & show bird
  
  // check for boundaries - reverse dir
  if (birdX<10  || birdX>width-80) {
    birdDX=  -birdDX;
  }
  if (birdY<0  || birdY>horizon-70) {
    birdDY=  -birdDY;
  }
  birdX=  birdX+birdDX;    // move bird
  birdY=  birdY+birdDY;
  
  smooth();
  fill(255,255,255);
  //--  triangle(25, 25, 75, 50, 25, 75);
  triangle(birdX+25, birdY+25, birdX+75, birdY+50, birdX+25, birdY+75);
  
  //head//
  smooth();
  fill(250,255,120);
  ellipseMode(CENTER);
  ellipse(400,150,55,55);
}  



void scene() {
  //// Make a scene.
  rectMode(CORNER);
  //sky// 
//--  fill(0,0,255);
//--  rect(0,0,500,horizon);
  background( 150, 200, 250 );
  
  //grass//
  fill(0,255,0);
  rect(0,horizon,500,500);
  
  //sun//
  smooth();
  ellipseMode(CENTER);
  fill(255,255,0);
  ellipse(sunX, 70, 50,50);
  sunX += 0.2;
  if (sunX > width) sunX=  0;
  //
  fill(0);
  textSize(14);
  text ( "+/-  for bird speed-up / slow-down", 10, 20 );
  text ( "Press q key to quit.", 10,35 );
 
}