// friction and speed_scale
// playing with these variables will affect gameplay
friction = 0.95;
speed_scale = 0.05;
// movieclip where I will draw the four elastics
_root.createEmptyMovieClip("drawing", _root.getNextHighestDepth());
// big square, the "player"
_root.attachMovie("big_square", "big_square", _root.getNextHighestDepth(), {_x:250, _y:200});
//attaching the four satellites
for (x=0; x<=3; x++) {
	sq = _root.attachMovie("square", "square_"+x, _root.getNextHighestDepth());
	// set their initial speeds to zero
	sq.xspeed = 0;
	sq.yspeed = 0;
}
// main function, to be executed at every frame
_root.onEnterFrame = function() {
	// rotate the big square
	big_square._rotation += 2;
	for (x=0; x<=3; x++) {
		// determining where SHOULD be the x-th satellite without elasticity
		should_be_x = big_square._x+80*Math.cos((big_square._rotation+45+90*x)*0.0174532925);
		should_be_y = big_square._y+80*Math.sin((big_square._rotation+45+90*x)*0.0174532925);
		// determining the distance between the point where it SOULD BE and where it IS
		dist_x = (should_be_x-_root["square_"+x]._x)*speed_scale;
		dist_y = (should_be_y-_root["square_"+x]._y)*speed_scale;
		// adding elasticity... refer to http://www.emanueleferonato.com/2007/09/01/controlling-a-ball-like-in-flash-elasticity-game-tutorial/
		_root["square_"+x].xspeed += dist_x;
		_root["square_"+x].yspeed += dist_y;
		_root["square_"+x].xspeed *= friction;
		_root["square_"+x].yspeed *= friction;
		_root["square_"+x]._x += _root["square_"+x].xspeed;
		_root["square_"+x]._y += _root["square_"+x].yspeed;
		_root["square_"+x]._rotation = big_square._rotation;
	}
	// drawing the elastics
	drawing.clear();
	drawing.lineStyle(1, 0x000000, 50);
	drawing.moveTo(big_square._x, big_square._y);
	drawing.lineTo(square_0._x, square_0._y);
	drawing.moveTo(big_square._x, big_square._y);
	drawing.lineTo(square_1._x, square_1._y);
	drawing.moveTo(big_square._x, big_square._y);
	drawing.lineTo(square_2._x, square_2._y);
	drawing.moveTo(big_square._x, big_square._y);
	drawing.lineTo(square_3._x, square_3._y);
};
// moving the big square if the player pressed mouse button
_root.onMouseDown = function() {
	big_square._x = _root._xmouse;
	big_square._y = _root._ymouse;
};