Start drawing the maze immediately to avoid flicker.

src/bin/maze/main.rs

@@ -162,7 +162,9 @@ fn main() -> std::io::Result<()> {
                 add_move(&mut open, arg, mid, (-1, 0));
                 add_move(&mut open, arg, mid, (0, -1));
             }
-        } else {
+        }
+
+        // draw maze
         let work = arg.max(1);
         let mut count = 0;
         while !open.is_empty() && count < work {
@@ -209,7 +211,7 @@ fn main() -> std::io::Result<()> {
 
                 count += 1;
             }
-            }
+
             if open.is_empty() {
                 board.set((1, 1), Square::Start);
                 board.set((x_maze_size - 2, y_maze_size - 2), Square::Finish);