//// Pool table



float left=50, top=50, right=550, bottom=350;  // table boundaries.

float ballR, ballG, ballB;
float ballX=left-4, ballY=top+6, ballDX=4, ballDY=9;

float greenX=left+30, greenY=top+40, greenDX=4, greenDY=9;



void setup() {
  size ( 600, 400 );
  reset();
}

void reset() {
  ballDX=  random( 10 );
  ballDY=  random( 24 );
  ballG=  random( 255 );
  greenX=  random(left, right);
  greenY=  random(top,bottom);

void draw() {
  action();
}

void action() {
  //// events
  solidballs();
  collisions();
}

void solidballs() {
  ballX += ballDX;
  ballY += ballDY;
  if ( ballX < left || ballX > right ) ball DX=  -ballDX;
  if ( ballY < top || ballY > bottom ) ball DY=  -ballDY;
  
  fill ( ballG );
  stroke ( 255-ballG );
  ellipseMode ( CENTER );
  ellipse ( ballX, ballY, 25, 25 );
  noStroke();
}