You need a few shrubs and some perennial flowers. You need to choose the shrubs you like, then find out how wide they grow and space accordingly.
While the shrubs grow to size you can fill in around them with perennial flowers, and more perennial flowers in front of the shrubs, the shrubs in the centre or towards the back of the beds, forming a backbone.
Choose shrubs and flowers according to your own preference, spreading their period of interest through the growing season. Check out our plant finder: https://gardenie.wpengine.com/findsupplier/ and visit garden centres.