Procedure:
Soak your oasis and then put it in your container.
First you want to use three irises in a staircase manner into your oasis.
Then you want to put your eucalyptus in an ascending manner behind and in front of your irises.
Now use your Gerbera Daises and put one in between the two tallest irises.
After that the second one will go on below that.
Then use your Lily and break it up so you get two parts.
Then use one in the front of your arrangement.
Now grab your second part of your Lily and use it in the side of your arrangement.
Next grab your last two irises and put them where you see best fit as in where there are empty spots in the arrangement that could use a flower.
Finally green in your arrangement with the provided greenery filling in all the spots.