Graphical Interpretation of an Interaction Effect

Hello, I have included an interaction term in my regression and was hoping to graphically interpret it as my variables are continuous.

I found a helpful do file from Golder's paper 'Understanding Interaction Effects' but I tried to do the graph and Stata didn't accept the graphical commands I was importing from the do file. Golder used Stata 8.0 and I am using Stata 11.0 (I have to use this one as my university provides me with access to this version only)

Could someone help me try and convert this to a Stata 11.0 friendly version? I am a Stata novice so I may have missed something very simple but would really appreciate some advice. Please find attached a pdf explaining the do file and the do file itself.