removing background color parameter

app.py

@@ -369,7 +369,6 @@ def sliding_window(text):
     ax.grid(False)
     plt.xlabel('Word Number', fontweight='bold')
     plt.ylabel('Difficulty Score', fontweight='bold')
-    fig.patch.set_facecolor('white')
     plt.suptitle('Difficulty Score Across Text', fontsize=14, fontweight='bold')
     plt.style.use('ggplot')