How to use only rectangle,circle and line to draw illustration in Sketch

I drew 18 famous robots for (one of our company product) before,and lots of people ask me how to do it in sketch,is that difficult?actually not,it’s super simple and I made this tutorial to show the making of.

you don’t need to use a pen tool to add lots of vector point and measure, adjust the curves.and you don’t need to use mouse to look up the sketch menu to find all the functions,because 98% of the step I use shortcuts.

I divide the robot into serval parts,when finish all parts,just put them into the right position,done.

here are the how-to.