Decisions can be up to the user or we can use internal GELLO code to execute them automatically, where this is a suitable design choice. Let's do a simple user decision to start. A subsequent tutorial will introduce GELLO programming to automate things.
Open the GLIFEditor and set up a starting patient state as before. Put a Decision node in the workspace using the Add Decision button 
. Link it to the Initial Patient state step and then put two more patient state steps coming out of the decision. Notice the colour of the decision step in the GLIFEditor. This will be a different colour when the decision is automated.
Run it and see what happens. Yes it stops at the decision step.
You need to click on the little green arrow in the decision. Then a dialogue box opens and you answer the question.
After doing this user driven decision notice how the GLIF flowchart has greyed out the path not chosen. The GLIF file therefore has a state ( basically it can remember where a user is up to). This can be tested and observed by going File, Save State in the top menu.
Now lets find out about branching the flowchart and bringing those branches back together.