Decked out in a purple suit coat and purple shoes, David B. Johnson appeared before a judge in the Markham courthouse last month on his 13th charge of driving on a suspended license. At that Jan. 23 hearing, Judge Christopher Donnelly sentenced Johnson to 10 days in jail beginning Feb. 6. The judge also sternly warned him not to drive his car before then. Johnson donned his purple fedora and full-length fur coat and walked out of the courthouse to his purple 1988 Cadillac. The dashboard of the immaculate four-door sedan had a placard that said "PIMP PLAZA" and the rear spare-tire cover was stenciled "Mister Oldskool." Johnson pulled out a feather duster -- purple, of course -- and cleaned off his car for about five minutes. Then he drove away -- with a bevy of female onlookers hooting and hollering to him. When Johnson pulled onto a street outside the Markham courthouse, Cook County Sheriff's Deputy Frank Czerwinski stopped Johnson's car and arrested him.