Summer of Code/2013/Turtle Blocks Python export project: Difference between revisions

add section on pending design decisions; add a pending decision
add a pending decision re speed of execution
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* When do we determine which block stacks are to be run? When we convert the code to Python or when the Python code is executed?
* When do we determine which block stacks are to be run? When we convert the code to Python or when the Python code is executed?
* Enable the user to control the speed of execution (e.g., by setting a global <code>step_time</code>)?
** How to implement this? E.g., call a <code>wait(step_time)</code> function in between two steps?