Updated the cube example
Updated the cube example

tempbottle/gfx,JohnColanduoni/gfx,bvssvni/gfx-rs,ColinKinloch/gfx,davll/gfx,ColinKinloch/gfx,red75prime/gfx,sectopod/gfx-rs,Bastacyclop/gfx,mitchmindtree/gfx-rs,aepsil0n/gfx-rs,gfx-rs/gfx-rs,JohnColanduoni/gfx,tanderegg/gfx,tanderegg/gfx,alexcrichton/gfx