On Saturday, graffiti artist Antonio “Chico” Garcia (on ladder) was working on East Houston St. near Avenue B on a mural based on the artwork from the cover of an upcoming CD release, “The Last,” by the group Aventura. After announcing three months ago that he would be leaving the Lower East Side to move to Florida, “Chico sightings” in the neighborhood made some wonder if he was going to go. He said he’ll be leaving for Florida next week.