float ballX;
float ballY;
int pos1;
int pos2;
int d;
float Gravity;

void setup() {
  //size of screen
  size ( 1080, 720);

  // where ball starts
  ballX = width/2;
  ballY = height/2;

  // ball width and height or better known as diamater
  d = 25;
}

void draw() {
  background (0);
  ellipse (ballX, ballY, d, d);
  stroke (255);
  fill (255, 0, 0);
  if (keyPressed){
    fill (0, 255, 0);
  }


  // if the ball goes off the screen to the left it will appear on the right and vice versa
  if (ballX<=0-d) {
      ballX = width;
    } else if (ballX>=width+d){
      ballX=0;
  }
  // if the ball goes off the top of the screen it will appear on the bottom and vice versa
  if (ballY<=0-d) {
      ballY = height;
    } else if (ballY>=height+d){
      ballY=0;
  }
  println("ballX:" + ballX);
  println("ballY:" + ballY);

}

// ball movement and "speed" when "key" is pressed
void keyPressed() {
  if (key == CODED) {
    if (keyCode == UP) {
      ballY -=15;
    } else if (keyCode==DOWN) {
      ballY +=15;
    } else if (keyCode==RIGHT) {
      ballX +=15;
    } else if (keyCode==LEFT) {
      ballX -=15;
    }

  }
}