PANAMA CITY — The Bay Arts Alliance mural program continues to colorize downtown buildings, as the first of eight artists began work on the district’s “Welcome Wall” this week. Four as-yet-unnamed artists will collaborate with Christon Anderson, Heather Clements, Joyful Enriquez and Jayson Kretzer on this mural project, which is going on the side of Ocean Oriental Market facing the intersection of sixth Street and Harrison Avenue.