rrent position */
	x[1] = x[2] = hpos;
	y[1] = y[2] = vpos;

	while(!eovals) {
		/* shuffle values */
		x[0] = x[1] ; y[0] = y[1]; x[1] = x[2]; y[1] = y[2];
		x[2] = getval()+x[1]; y[2] = getval()+y[1];
		if(eovals) {