Procedure:
First you want to soak your block of oasis in water NOT pushing it down, just setting it gently in the water to absorb it all on its own.
Then you want to cut your oasis to fit your container and put it inside there taping it to your container with waterproof tape in a cross.
To start with your flowers you want to get your roses and make a base by putting them in the oasis.
You want to put the first one in the side of the oasis making it the longest point but not too long. Then the next one on top diagonally in one of the quadrants you made with your tape. Then the next one across from it being the shortest and standing more straight.
Now you want to add some leather leaf greenery against your roses to make them look more natural.
Then you want to set up your shape with Italian ruscus sticking it in the side of the oasis and letting it drape outwards.
Then now you're going to fill in with the rest of your ruscus stem to fill in some of the spots.
Now you want to use your mums and stick them around the arrangement.
Next use your solidago to fill in any green spaces you want to in your shape.
Then add your final greenery of pitt and seeded eucalyptus to fill in any holes.
Finally you add your two carnations at the top in your spaces.