Update app.py

app.py

@@ -59,7 +59,7 @@ def draw_grid(data):
     ax.set_xlim(0, ncols)
     ax.set_ylim(0, nrows)
     ax.set_xticks(range(ncols+1))
-    ax.set_yticks(reversed(range(nrows+1)))
+    ax.set_yticks(range(nrows+1))
     ax.grid(True)
     
     # Plotting each building with its assigned color from the color_codes dictionary