int score=0;
float horizon;
void setup() {
 //// setup ////
 size ( 650,450 );
 horizon=  height/4;
}
void draw()  {
 
 
  // next frame //
  scene();
}

void scene() {
  // sky, waves etc.
  background( 200,200,255 );
  fill(200,200,255);                
  fill( 200,250,255);            
  rectMode( CORNER );
  rect (0,horizon, width,height*3/4);
}