/**
ball
mousePress
*/
int ballX  = 0;
int ballY  = 0;
//int speedX = 0;
int speedY = 0;
int R      = 15;
float g    = 0.83;
float p    = 0.8;

void setup(){
  size(400,400);
  background(200);
  noStroke();
  rectMode(CENTER);
  frameRate(60);
  ballX = width/2;
  ballY = R;
}

void draw(){
  background(200);
  fill(0);
  ellipse(ballX,ballY,R*2,R*2);
  
  speedY += .5 * g;
  ballY += speedY;
  if(ballY + R > height){
    ballY = height - R;
    speedY *= -p;
  }
  if(ballY < R){
    ballY = R;
    speedY *= -p;
  }
}

void mousePressed() {
  speedY += 5 * g * (speedY < 0 ? -1 : 1);
 // ballY = R;
}