Update visualizer background

main.py

@@ -105,7 +105,7 @@ def predict(pdb_code, pdb_file):
     pdb = open(pdb_file.name, "r").read()
 
     view = py3Dmol.view(width=600, height=400)
-    view.setBackgroundColor('black')
+    view.setBackgroundColor('white')
     view.addModel(pdb, "pdb")
     view.setStyle({'stick': {'colorscheme': {'prop': 'resi', 'C': 'turquoise'}}})