Update app.py

app.py

@@ -62,7 +62,7 @@ def run_script(url: str, height: int, width: int, check_b,check_h):
             print (page.get_attribute('theme'))
             driver.execute_script("arguments[0].theme='gab-black';",page)
             print (page.get_attribute('theme'))
-            
+            driver.navigate().refresh()
             main_head = driver.find_element(By.CLASS_NAME, "main-content-header")
             driver.execute_script("arguments[0].style='background:#474747;color:#000000;';",main_head)