Continuous Line Exercise Template

While I was working on a commission, I tend to notice my ability to control my strokes diminish after not drawing for a set period.  So I kind of made up this exercise to help me warm up my arm muscles and to help me control my strokes better.  

I doubt anyone would use this template but I just thought it was worth sharing because while it is extremely challenging (at least for one who neglects their art like myself), it no doubt helps me make more cleaner controlled lines.  

I hope you guys will use this, let me know what you guys make with this. You could use even more extreme shapes, doesn't have to be basic ones.  

For example:A Star or Octagon.

Heres Mine: fav.me/db5qyt6