animations: add other two sides for outline pattern

src/animations.rs

@@ -96,6 +96,8 @@ impl Shader for TestShader {
                 (0, 0) => RGB8::new(255, 255, 255),
                 (0, _) => RGB8::new(255, 0, 0),
                 (_, 0) => RGB8::new(0, 255, 0),
+                (255, _) => RGB8::new(0, 0, 255),
+                (_, 255) => RGB8::new(0, 0, 255),
                 _ => RGB8::new(0, 0, 0)
             }
         }