add gradient of color for the ongoing path

src/ui/maze.py

@@ -23,7 +23,7 @@ COLORS = {
     "cell": (0, 128, 0),
     "link": (0, 102, 0),
     "walls": (200, 200, 200),
-    "path": (100, 0, 0),
+    "path": (200, 0, 0),
     "path link": (80, 0, 0),
     "path ends link": (255 * 0.7, 165 * 0.7, 0),
     "path start": (255, 165, 0),
@@ -227,9 +227,17 @@ class Canva:
                         width=int(maze["size"] * STYLE["link width"]),
                     )
                 else:
+                    p = i / len(path)
+                    rs, gs, bs = COLORS["path"]
+                    re, ge, be = (0, 0, 0)
+                    c = (
+                        p * rs + (1 - p) * re,
+                        p * gs + (1 - p) * ge,
+                        p * bs + (1 - p) * be,
+                    )
                     pygame.draw.line(
                         self.screen,
-                        COLORS["path link"],
+                        c,
                         (x_a, y_a),
                         (x_b, y_b),
                         width=int(maze["size"] * STYLE["link width"]),
@@ -253,7 +261,15 @@ class Canva:
                     )
                     pygame.draw.rect(self.screen, c, a, border_radius=r)
                 else:
-                    pygame.draw.rect(self.screen, COLORS["path"], a, border_radius=r)
+                    p = i / len(path)
+                    rs, gs, bs = COLORS["path"]
+                    re, ge, be = (0, 0, 0)
+                    c = (
+                        p * rs + (1 - p) * re,
+                        p * gs + (1 - p) * ge,
+                        p * bs + (1 - p) * be,
+                    )
+                    pygame.draw.rect(self.screen, c, a, border_radius=r)
 
         # walls
         h = [