Ahh i see lol

Well the wallpapers that come with the phone are the ones you've already seen.
If you want to change the actual colour of your home screen (e.g. completely red wallpaper):
You have to download it of the internet first and then transfer it to your Wildfire by plugging it into the pc via a USB cable then selecting 'Disk Drive' on your Wildfire when the notification appears that prompts you to select your device mode