(Portland, OR)  --  A Warm Springs woman, who prosecutors say started a brush fire because her bored firefighter friends needed work, will be paying for that mistake for the rest of her life.  Twenty-three-year-old Sadie Renee Johnson has been ordered by a federal judge to pay a minimum of 50 dollars a month until she pays off the seven-point-nine-million dollars it cost to fight the brush fire, which grew into a full-blown wildfire that scorched more than 51-thousand acres in central Oregon last year.  Prosecutors say Johnson posted a Facebook message saying she had started the fire, which devastated land on the Warm Springs Indian Reservation.  Johnson was also sentenced to 18 months behind bars and will be required to spend an additional six months at an in-patient drug-and-alcohol center.