Update app.py

app.py

@@ -82,7 +82,7 @@ def run_script(url: str, height: int, width: int, check_b,check_h):
                 except Exception:
                     mes="<center>Some blocks returned an error"
             if out_box:
-                for i in range(len(out_box)-2):
+                for i in range(0,len(out_box)-2):
                     if i == 0:    
                         im_roll = get_concat_v_cut(f'{out_box[i]}',f'{out_box[i+1]}')
                         im_roll.save(f'comb-{uid}-tmp.png')