THIS IS the home of Mrs. E. B. Gravette, Red Bluff, California, designed by Draftsman George Bruyers, of Chico, built by Contractor Rudolph Rapp, of Red Bluff, for Mrs. Gravette and her two sons and three daughters. Medium- size rooms reduced costs, and the finished basement provides rooms for the housekeeper. A double door was used for the dining-room to avoid blocking the window or walls, and another, louvered with blinds from an abandoned school, was used in the kitchen entry hall. There's an authentic Dutch door from entry to back hall, and, in fact, all doors have the four raised panels of the typically Dutch Colonial door. Inside the house trim is light ivory, while the exterior is painted a gleaming white, with shutters and wood shingles painted green.