Question about loop

[Pires]

Hey everyone, I need help.
I'm creating a basic script that works like this:
The user gets a pokémon, then have to input +1 to increase its level until level 10, after the condition is true the user will be able to evolve it. For now I have this:

inicio = str(input('Input 1 to start:'))
poke = 'Pokémon'
level = 1
começou = 'You got a pokémon. Input +1 to increase its level!'
lvlup = 'Congratulations! Your pokémon grew to level: '
if inicio == '1':
 aaa = str(input(começou))
 começou = aaa
 if começou == '+1':
   print (lvlup + str(level))
   level += 1
 else:
   print('You have to input +1!')

I have no idea how can I do the while loop in this code, because I need the code to "restart" everytime the level up message is displayed.
Can someone give me some help so I can be able to finish this code please?

Thanks!