I WAS PAINTING MY SISTERS ROOM WITH THE COLORS YELLOW AND GREEN, I WAS DOING A DESISN SO I WROTE IN A BLUE INK PEN WHERE I WAS GONNA PUT THE YELLOW PAINT. BUT KNOW THAT I HAVE PAINTED THE YELLOW PARTS OF THE DESING I NOTICE THAT THE PEN INK STAINS JUST WONT GO AWAY. I KEPT ON GOING OVER THE INK WITH THE PAINT BUT NOTHING SEEMS TO WORK. THIS IS A RECENT CASE SO I WOULD LIKE TO FIX IT BEFORE IT BECOMES TO LATE. WHAT SHOULD I DO?