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How about this design?
All images are the same - just different sizes.

ResteemBot - Copy - Copy.png
ResteemBot - Copy (2).png
ResteemBot - Copy.png
ResteemBot.png

Good design.
Also - it scales well to different sizes.

Here is the same one with a small change - the middle pillar is more obvious in it's root. (Basically I just added 2 white lines.)

ResteemBot.png