v------------------- copy the code on the left

x = input("> ")
b = "*  "+x+"  *" # add star thingies
y = len(b)
z = 50 - y
a = z // 2
if len(b) % 2 == 1: # odd
  print("\_" + " " * a + b)
else: # even
  print(" " * a + b)

go to https://pythonsandbox.com

paste the code ino the editor window

click the play button at the bottom of the page

write the name of your menu theme into the popup dialog

copy the output and paste it into the second line of your Show Text command