Post #1035: 
atekdigital:
Great video https://www.youtube.com/watch?time_continue=204&v=-RQFK1kqqVw with good presentation. Need little help if i want to control the pillar or tower what can i add the code. Im just newbie to code or say zero code knowledge. When the tower is extruded it should stop and ask for the height or extruding level and then enter value it should work future. Thanks
It depends on the tool.
To run extrude tool in interactive mode you need to unset Vector value.
You can enter the value while extrude tool is active and press LMB or Enter.