tiny 4wd

this is a tiny 4wd chassis like the raspberry pi zero one but i tried to make it cheeper version of it.But mine uses a nodemcu and 600rpm n20 motors but i drilled holes to screw the node to the chassis because I did not know where they would go but feel free to remix it as much as you like if you like.the code is run by an android app called remote xy to get the code go to this github page.
https://github.com/osubboo/SmarsLineTracker