Fixing gray background on plot

app.py

@@ -371,7 +371,7 @@ def sliding_window(text):
     plt.ylabel('Difficulty Score', fontweight='bold')
     plt.suptitle('Difficulty Score Across Text', fontsize=14, fontweight='bold')
     plt.style.use('ggplot')
-
+    ax.set_facecolor('w')
     fig = plt.gcf()
 
     map = [('', 0)]