Orchestrator + powershell script : variable

Hi,

I want create a workflow with an external script powershell and "scriptable task".

First step :

1. i set my input parameters in "Scriptable task"  and set in "scripting" tab my variable input for the external script powershell : scriptArgs = Variable1 + " " + Variable2;

2. i get my variable in my external first script powershel --> at this step it's OK

3. in my external first script powershell, i create variables $var1 and $var2

Second step :

1. I create a "Scriptable task" and i want get powershell output ($var1 and $var2) in input for my "scriptable task"

I don't know how passing a powershell variable to other "workflow element" or "scriptable task"