Variable changing Talksprite

[Kisses Fingers]

Hi everyone! This is my first time using Ren'py, and I've run into a slight hurdle.

I wanted to write a script so that a character's sprite changes depending on a variable if the person playing the game makes any poor choices (Armour breaking, bruises appearing, etc). My first solution was to write

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show moon smile 0 at left
    if moon > 0:
        show moon smile 1 at left:

But I realised that this would be pretty inefficient every time I wanted to change the character's expression. I tried finding a solution myself and I thought putting something like this

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init:
    $ moon = 0
        
    image moon smile 0 = moon_smile_0.png
    image moon smile 1 = moon_smile_1.png
    image moon smile 2 = moon_smile_2.png
    image moon smile 3 = moon_smile_3.png
    image moon smile:
        choice (moon == 0):
            "moon smile 0"
        choice (moon == 1)
        choice (moon == 02:
            "moon smile 2"
            "moon smile 1"
        choice (moon == 3):
            "moon smile 3"

Could work, letting me just type "show moon smile" to get the main character in their current damaged state, but instead it only ever returns moon_smile_0.png.

I feel like there's something obvious I'm missing!! I've only started using Ren'py a few days ago though and have never really coded before. Any help

[Imperf3kt]

You want to use either ConditionSwitch or LiveComposite
https://www.renpy.org/doc/html/displayables.html

[Kisses Fingers]

Oh, thanks for the advice!! It isn't particularly elegant, but I used this for my code

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image moon smile = ConditionSwitch(
    "moon == 1", "moon_smile_1.png",
    "moon == 2", "moon_smile_1.png",
    "moon == 3", "moon_smile_3.png",
    "True", "moon_smile_0.png")

That seems to have pulled it all together though. Thank you!!