extern void object::Activity( )
{
	float	dist;

	errmode(0);  // ne stoppe pas si erreur

	while ( true )
	{
		dist = 2+rand()*3;

		turn(90);
		move(dist);
		wait(0.5);
		turn(-90);
		wait(2+rand()*3);
		turn(-90);
		move(dist);
		wait(0.5);
		turn(90);
		wait(1+rand()*1);
	}
}