Lego Boost Writer-Bug (MOC based on 17101)

See book with 6 complex Boost models on Amazon: The Lego BOOST Expert Book https://www.amazon.com/dp/1081209488/ref=sr_1_1?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&keywords=lego+boost+expert+book&qid=1563601579&s=gateway&sr=8-1 German Version: https://www.amazon.de/Lego-Boost-Experte-Programmier-Anleitungen-Boost-Bausatz/dp/1077293895?pf_rd_p=1d845bea-8a37-4701-8792-ce8d67e64a10&pd_rd_wg=ETpAh&pf_rd_r=YMVXTRP381MJ21TC7KTF&ref_=pd_gw_cr_simh&pd_rd_w=H1EOH&pd_rd_r=1b250d86-4f26-4094-a12d-ae0ba8ed65a1 Building and coding instructions are available on Rebrickable.com: https://rebrickable.com/users/Bundy/mocs/ This MOC can write the entire alphabet or draw simple shapes. With a small sensor attachment it can even copy simple shapes.