There is no way unless you jailbreak that only customisation u could do to ur home screen is changing ur wallpaper and arranging the apps to the way you like.
I am jailbroken
There is a tweak that goes by the anemone that requires custom source in cydia
How would I go about doing this please?
If you want a sample theme, you could use ADDO10. Its my theme and it's been updated to work with Anemone. Just search for it in Cydia.