void draw(){  scene();  fish();   shark(); octopus(); grading(); }
void grading()		//// Exam grading
{ int gx=400, gy=20,gs=0;
	text( "X"+"  WHO???.", gx,gy+13*gs++ );
	text( 0+"  scene.", gx,gy+12*gs++ );
	text( 0+"  fish.", gx,gy+12*gs++ );
	text( 0+"  octopus.", gx,gy+12*gs++ );
	text( 0+"  shark.", gx,gy+12*gs++ );
	text( 0+"  coding.", gx,gy+12*gs++ );
}