Sdl or Brick oreatet

Hello im new in grasshopper and i need help
i start to make a pipe wall for my project where i need to use brick material but i dont know how to make SDL LIne in one direction Normal
And brick use 2 poit of line to move brick

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If you internalise the definition, we would have a better chance of helping you.
Ps. no need to internalise everything, just the stuff that references to Rhino.