Right to left...You'll need three variables:Var1 = The most recent valueVar2 = The previous string of valuesVar3 = Var2 + Var1Your action group would look like this:Set Var 1 on mouse click to appropriate variable (user clicks 3)Set Var 3 to equal Var 2 (user has not previously clicked anything so the value is null)Add Var 1 to Var 3 (value of 3)Change Contents (reported value of 3)Set Var 2 to Var 3 (Var2 now equals 3)When these steps are repeated:Var1 = 6Var3 to equal Var2 = 3Add Var1 to Var3 = 36Change Contents = "36"Set Var2 to Var3 = 36Repeated again:Var1 = 2Var3 to equal Var2 = 2Add Var1 to Var3 = 236Chg Contents = "236"Set Var2 to Var3 = 236Add an OnClick action to the buttons to run this action group.
