You can use these drills to add some footwork and agility to your summer shooting workouts.
They are from Basketball Performance Coach Alan Stein. You can find more videos and ideas dealing with all aspects of the physical development of your athletes at his website: Stronger Team. He also puts out a lot of great content on Twitter: @alanstein
Or, to make them fit your system, you might want to put the cones in spots where your shooters receive screens in your offensive system.
You can add a time or scoring factor and include the footwork that you teach to make the drills your own and make them competitive.
The videos are You Tube videos, so make sure you can access them on the server you are using and make sure your sound is on.